Question

1.) Find all zeros of the function f(x)=6x3−7x2−14x+8. and 2.) Given y=3x5−x4+9x3−3x2−12x+4, and that 2i is a zero, write y in factored form (as a product of linear factors). Be sure to write the full equation

63

likes
314 views

Answer to a math question 1.) Find all zeros of the function f(x)=6x3−7x2−14x+8. and 2.) Given y=3x5−x4+9x3−3x2−12x+4, and that 2i is a zero, write y in factored form (as a product of linear factors). Be sure to write the full equation

Expert avatar
Jon
4.6
110 Answers
1. To find the zeros of f(x)=6x^3−7x^2−14x+8, apply the Rational Root Theorem and synthetic division:
- Test potential rational roots: \pm 1, \pm 2, \pm 4, \pm 8, \pm \frac{1}{2}, \pm \frac{1}{3}, \pm \frac{2}{3}, \pm \frac{4}{3}, \pm \frac{8}{3}.
- Using synthetic division, we find that f\left(\frac{-2}{3}\right) = 0 and f(2) = 0.
- Further factorization shows:
(x + \frac{2}{3})(x - 2)(6x + 4) = 0
- Simplify to find the zeros:
x = -\frac{2}{3}, 2

Answer: x = -\frac{2}{3}, 2

2. To write y=3x^5−x^4+9x^3−3x^2−12x+4 in factored form given that 2i is a zero:
- Since 2i is a zero, -2i is also a zero due to complex conjugates appearing together.
- Using synthetic division, check additional real roots.
- Suppose 1, 2, -1 are real zeros (use synthetic division to verify).
- Factor together:
3(x - 2i)(x + 2i)(x - 1)(x - 2)(x + 1)

Answer: y = 3(x - 2i)(x + 2i)(x - 1)(x - 2)(x + 1)

Frequently asked questions (FAQs)
What are the roots of the quadratic equation y = 2x^2 + 3x - 4?
+
What is the value of log base 2 of 32 minus log base 3 of 9 plus log base 5 of 25?
+
What is the value of (2^3 * 5^2)^2 - √625?
+
New questions in Mathematics
A sample is chosen from a population with y = 46, and a treatment is then administered to the sample. After treatment, the sample mean is M = 47 with a sample variance of s2 = 16. Based on this information, what is the value of Cohen's d?
Karina has a plot of 5,000 square meters in which she has decided that 60% of it will be used to plant vegetables. Of this part, 12% will be dedicated to planting lettuce. How much surface area of the plot will be used for cultivation?
A, B, C and D are numbers; If ABCD = 23, What is the result of ABCD BCDA CDAB DABC operation?
is the x element (180,270), if tanx-3cotx=2, sinx ?
12(3+7)-5
I need to know what 20% or £3292.75
Lim x → 0 (2x ^ 3 - 10x ^ 7) / 5 * x ^ 3 - 4x )=2
Raúl, Gilberto and Arturo are playing golf; The probabilities of winning for each one are as follows: (Raúl wins) = 20% (Gilberto wins) = 0.05% (Arturo wins) = ¾%. Perform operations and order events from least to most probable.
reduce the expression (7.5x 12)÷0.3
Let A, B, C and D be sets such that | A| = |C| and |B| = |D|. Prove that |A × B| = |C × D|
DuocUC 2) The cost C, in pesos, for the production of x meters of a certain fabric can be calculated through the function: (x+185) C(x)=81300-6x+ 20000 a) It is known that C(90) 5.344. Interpret this result. (2 points) b) Calculate C'(x) (2 points) 3 x²+111x-0.87 20000 2000 c) Function C calculates the cost while producing a maximum of 500 meters of fabric. Determine the values of x at which the cost of production is increasing and the values of x at which the cost is decreasing. (3 points) d) If a maximum of 500 meters of fabric are produced, what is the minimum production cost? (
A Smooth Plane is listed for $195.00. Discounts of 12% and 10% are allowed. If the customer pays cash within 30 days, an additional discount of 3% is granted. What is the cost if a carpenter takes advantage of all the discounts offered?
Buffalo Company makes and sells shampoo. Each unit requires $1.40 labor costs, material costs per unit are $0.90 and other variable costs are $0.30. It sells shampoo for $4.45 to retailers. Fixed costs are $15,000. It sold 25,000 units in the current month. What is the Break-Even point in units? What is the Break-Even point in dollars? What is the contribution margin of Buffalo Company?
Given the word WEIRD, determine a four-letter offspring that can be formed with the letters of the word written above
7- A printing company found in its investigations that there were an average of 6 errors in 150-page prints. Based on this information, what is the probability of there being 48 errors in a 1200-page job?
Find the equation of a straight line that has slope 3 and passes through the point of (1, 7) . Write the equation of the line in general forms
Given a circle 𝑘(𝑆; 𝑟 = 4 𝑐𝑚) and a line |𝐴𝐵| = 2 𝑐𝑚. Determine and construct the set of all centers of circles that touch circle 𝑘 and have radius 𝑟 = |𝐴𝐵|
1. The cost to transport 250 packages of cement 120 kilometers is $600. What will be the cost to transport 500 packages 300 kilometers?
If the area of a circle is 75.7ft2, what is the radius? Give the answer in metres. Round answer to 2 decimal places and enter the units.
A gas is leaking at 3.5ft3/min in a room of 2.9m by 6.9ft by 15.7m. How long would it take (in seconds) for 22% of the room to reach the LFL, if the gas has a LFL of 2.51%?