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Mathematics
Graham Moran
29 October, 19:49
Factor completely: 10x2 + 2x - 8
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Sienna Case
29 October, 21:33
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The answer is 2 (5x - 4) (x + 1)
10x² + 2x - 8 = 2*5x² + 2*x - 2*4 =
= 2 (5x² + x - 4) =
= 2 (5x² + 5x - 4x - 4) =
= 2 (5x * x + 5x*1) - (4*x + 4*1) =
= 2 (5x (x + 1) - 4 (x + 1)) =
= 2 (5x - 4) (x + 1)
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