ToddFunk ToddFunk

26-04-2018
Mathematics

contestada

Which of the following are solutions to 2x^2 - 8x - 90? Select all that apply. A) 2, B)-5, C)-7, D)9, E)15, F)5, G)7

Respuesta :

choixongdong choixongdong

26-04-2018

2x^2 - 8x - 90
= 2 (x^2 - 4x - 45)
= 2 (x - 9)(x + 5)

so
x - 9 = 0; x = 9
x + 5 = 0; x = -5

solutions -5 and 9

answer
B)-5
D)9

Answer Link

Otras preguntas

Please help stuck on this question! evaluate show your work.

What is the square root of 7 + x if x is 100 - 26

Select the correct answer. Chloe enjoys her math classes, and she would like to find a career that will allow her to continue to use her math skills. Which care

can you show me how to solve this math problem step by step 6+17/20

What impact did the Erie Canal have on the United States? A)It increased the sale of rowboats in the United States. B)It established a method for increasing t

The state of Georgia is located on what continent?

Nancy is a highly respected person within her community. she is hispanic in a largely caucasian-populated area. since nancy was looking for a new job, she went

Does anyone know this y=4^x

(2.5 x 10^-8) (9 x 10^-10) Express your answer in scientific notation.

What is the median PLZ HELP