nialiveQueenB nialiveQueenB

18-02-2016
Mathematics

contestada

Find the roots of the polynomial equation. x^2 – x – 72 = 0 Question 1 options: A) 9 and –8 B) –6 and 6 C) –2 and 16 D) –9 and 8

Respuesta :

Panoyin Panoyin

18-02-2016

x² - x - 72 = 0
x² - 9x + 8x - 72 = 0
x(x) - x(9) + 8(x) - 8(9) = 0
x(x - 9) + 8(x - 9) = 0
  (x + 8)(x - 9) = 0
x + 8 = 0 or     x - 9 = 0
  - 8 - 8 + 9 + 9
x = -8 or x = 9

The answer is A.

Answer Link

Otras preguntas

Use a reference angle to find the exact value of the sine, cosine, and tangent of 4π/3.

A car when resold had decreased in value by 26% to $12500. What was the original price of the car to the nearest dollar?

A patient who contributes to causing harm is guilty of _______ negligence

what else would need to be congruent that ABC=PQR by SSS

Read the excerpt from "The Most Dangerous Game." "Where there are pistol shots, there are men. Where there are men, there is food," he thought. But what kind

Complete the following chart. Round dollar amounts to the nearest cent and percents to the nearest tenth of a percent.

What is a function graph

Question 12(Multiple Choice Worth 5 points) (07.01 MC) The number of chips of different colors in Amy's bag is shown below: 8 blue chips 9 pink chips 1 white

#4 is 28 it just got cut off

i dont know how to solve this problems