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19 May, 10:55

Simplify: (7x2 - 8x - 4) + (-2x2 + 3x + 5) + (5x2 - 10x - 8)

a 10x2 + 15x - 7

b 10x2 + 5x - 7

c 10x2 - 15x - 7

d 10x2 - 15x - 9

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Answers (1)
  1. 19 May, 12:22
    0
    7x^2 - 8x - 4 + (-2x^2 + 3x + 5) + 5x^2 - 10x - 8 =

    7x^2 - 8x - 4 - 2x^2 + 3x + 5 + 5x^2 - 10x - 8 =

    10x^2 - 15x - 7 <==
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