Answer:
-26x
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