ktorres30 ktorres30
  • 03-06-2021
  • Mathematics
contestada

what is the answer to x^{2}-2x=15

Respuesta :

Jhouni
Jhouni Jhouni
  • 03-06-2021

Answer:

Two solutions:

x = 5 and x = -3

Step-by-step explanation:

Simplify:

x^{2} - 2x = 15

-15              -15

x^{2} - 2x -15 = 0

Find what numbers multiplied by eachother equal -15 and also add to -2:

-5 * 3 = -15

-5 + 3 = -2

Rewrite equation and put each expression equal to 0:

(x - 5)(x + 3) = 0

x - 5 = 0      x + 3 = 0

  +5    +5         -3     -3

x = 5            x = -3

Answer Link

Otras preguntas

Which table shows a proportional relationship between x and y?
American Values and Economic Goals
There are a total of 64 students in a drama club and a yearbook club. The drama club has 14 more students than the yearbook club.a. Write a system of linear eq
How would u figure this out?
BRAINLIEST ANSWER GOES TO WHOEVER ANSWERS CORRECTLY Which activity is good for building strength? (A)sit and reach (B) crunches (C) one mile run (D) gymnastics
THIS whole thing is called an ______? ↘ .........12 + 8 ÷ (5 + 3) - 8
I don't know how to do this one. plz help
in what time period did archaea first formed?
If Mary has stopped her resistance training for three weeks, once she continues, she should _____.
What phrase have some scholars devised to replace the term “melting pot” theory? A. half-empty–half-full theory B. nativism theory C. fruit salad theory D. c