Question

A= 7x2-4x+5, B= -3x2+2x-1, C= 5x2-x+9 The value of A -B is _____​

Answer 1

Answer:

$a - b = 14 - 4x + 5 - ( - 6 + 2x - 1) \\ a - b = 19 - 4x + 6 - 2x + 1 \\ a - b = - 6x + 6 \\ a - b = - 6(x - 6)$

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