Answer:
a = 2 , b = - 7 , c = - 8
Explanation:
expand and simplify the left side then compare the coefficients of like terms on both sides.
(2x + 3)(x - 5) + 7 ← expand factors using FOIL
= 2x² - 10x + 3x - 15 + 7 ← collect like terms
= 2x² - 7x - 8
compare to ax² + bx + c , then
a = 2, b = - 7 , c = - 8