Question

Solve. x^2 – x = 20.
Answer

A. x = –10 and x = 2

B. x = –5 and x = 4

C. x = 5 and x = –4

D. x = 10 and x = –2 Solve. x^2 – x = 20.
Answer

A. x = –10 and x = 2

B. x = –5 and x = 4

C. x = 5 and x = –4

D. x = 10 and x = –2 @Mathematics

Answer 1

C

Answer 2

Thank you, love (:

Answer 3

\[x^2-x-20=0\]
\[(x-5)(x+4)=0\]
\[x-4=0\implies x=4\]
\[x+5=0\implies x=-5\]

Answer 4

:D

Answer 5

in case you actually have to do this on a test, good to have some method right?

Answer 6

Of course. Lol Thank you :)

Answer 7

satellite are you okay?

Answer 8

you switched your signs

Answer 9

x+4=0 => x=-4
x-5=0 => x=5