Lf p (x) = x2 –1 and q ( x ) = 5x-5 which expression is equivalent to (p-q) (x )?

Sanderson is having trouble with his assignment. his shown work is as follows: − 3 7 7 3 = − 3 7 × 7 3 = − 21 21 = −1 however, his answer does not match the answer that his teacher gives him. complete the description of sanderson's mistake. find the correct answer.