(9x 2 −8)−(−4x 2 −5x)

1 3 2+ 5 − 8

Step-by-step explanation: It is 13x to the 2nd power plus 5x minus 8

-26x

Step-by-step explanation:

(9x 2 −8)−(−4x 2 −5x)

(9x)(2-8)-(4x)(2-5x)

^separating x so i can distribute but the ones that are sitting weirdly in the  parentheses (see how there isnt a sign separating 9x and 2? im going to seperate them via parentheses which is the same thing as adding a sign there. Same with -4x and 2)

we are going to distribute now. 9x*2, 9x*-8 -4x*2 -4x*-5x

(18x-72x) - (-8x+20x)

Its going to look like this ^

add or subtract the stuff in the parentheses

-54x+28x

-26x

i would say c is the best answer, hope it's right!

good luck! =)

cutie~