A=2x^2-4x-7, B=x^2+6x-4, C=-6^2-2x+2 find A+B-C
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Step-by-step explanation:
Given is A = 2x^2-4x-7
B = x^2+6x-4
C = -6x^2-2x+2
A+B = [(2x^2+x^2)+(-4x+6x)+(-7-4)]
= 3x^2+2x-11
(A+B)-C = [(3x^2+2x-11)-(-6x^2-2x+2)]
= [(3x^2-(-6))-(2x-(-2x)-(-11+2)]
=-3x^2-4x +9
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