what values of a,b,c make this equation true? (2x-5)(x+2)+(ax^2+bx+c)=6x^2-4x-7

Answer:
A - a = 4, b = -3, c = 3
Step-by-step explanation:
When you substitute in a, b, and c you get
(2x - 5) (x + 2) + (4x^2 + -3x + 3)
collect like terms
(2x)(x) + (2x)(2) + (−5)(x) + (−5)(2) + 4x^2 + −3x + 3
combine like terms
2x^2 + 4x + −5x + −10 + 4x^2 + −3x + 3
(2x^2 + 4x^2) + (4x + −5x + −3x) + (−10 + 3)
6x^2 + −4x + −7
6x^2 + −4x −7