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21 October, 21:15

What is A2 - (B + C) in simplest form?

A=8x2 - 25x + 7

B=8x2 - 25x + 11

C=10x2 - 25x + 7

D=10x2 - 25x + 11

A, B, and C are polynomials, where:

A = 3x - 4

B = x + 7

C = x2 + 2

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Answers (1)
  1. 21 October, 22:25
    0
    A2 - (B + C) = (3x - 4) 2 - ((x + 7) + (x2 + 2))

    A2 - (B + C) = 9x2 - 24x + 16 - (x2 + x + 9)

    A2 - (B + C) = 9x2 - 24x + 16 - x2 - x - 9

    A2 - (B + C) = 8x2 - 25x + 7

    So, the answer is

    A:

    8x2 - 25x + 7
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