Question

Solve.

2x2 + x – 1 = 9

Answer 1

let me post the answer choices!

Answer 2

Do you me 2^2?

Answer 3

subtract the 9 so we have the equation = to 0
\[\huge 2x^2+x-10\]
them multiply a*c

factor it out the factors are 5 and -4
they add to 1 and multiply to -20

Answer 4

(x+5)=0
(x-4)=0

Answer 5

then just solve the equations :)
x+5=0
x-4=0

Answer 6

Faster than the answer choices!

Answer 7

the answer is 6