DayDay131 DayDay131

03-06-2018
Mathematics

contestada

Which of the following are solutions to the equation below? Check all that apply. x2 + x - 20 = 0

Respuesta :

adrielcavalcant adrielcavalcant

03-06-2018

Δ = 1 + 4*20 = 81
x' = (-1 + 9)/2 = 4
x'' = (-1 - 9)/2 = -5
4² + 4 - 20 = 0
(-5)² - 5 - 20 = 0
Ok !

Answer Link

lamontgoff14 lamontgoff14

14-11-2019

Answer:-5 and 4

Step-by-step explanation:

apex

Answer Link

Otras preguntas

PLEASE HELP ASAP!!! WILL MARK BRAINLIEST !!

Under what circumstance did Africans come to South America

(2w-5)(w+7) so far I got 2w^2 + 9w + ?

I need help with dis giving brainliest

A produce store sold 63 red apples If the ratio of red apples to green apples sold was 7:2 what is the amount of green apples sold

Find the range of the function for the given domain. -> f(x)=2x-6; {-2, -1, 0, 1, 2} What is the range? A. {-10, -7, -6, -3, -2} B. {-10, -7, -7, -3, -2} C.

Name one common communicable disease, then tell me its pathogen, its vector, two symptoms of the disease, and how you would treat the disease.

There are 96 problems on a math test. 40% is Algebra problems and the rest are Arithmetic problems. How many Arithmetic problems are on the test?

The what case of the pronoun indicates that's it is the receiver of the action

2.04 5 paragraph wring Assignment prove it