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HarrisMcgilton HarrisMcgilton
  • 17-06-2015
  • Mathematics
Answered



If A = 3x^2 + 5x - 6 and B = -2x^2 - 6x + 7, then A - B equals

(1) -5x^2 - 11x + 13 (3) -5x^2 - x + 1

(2) 5x^2 + 11x - 13 (4) 5x^2 - x + 1

Verified Answer :

naǫ
naǫ naǫ
  • 17-06-2015

\(A=3x^2+5x-6 \\ B=-2x^2-6x+7 \\ \\ A-B= \\ 3x^2+5x-6-(-2x^2-6x+7)=\\ 3x^2+5x-6+2x^2+6x-7= \\ 5x^2+11x-13\)

The answer is (2).

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