3 years ago

Simplify 8x + 4xy - 2y + 5xy - 3x + 7xy

Mathematics

1 answer:

hodyreva [135]3 years ago

3 0

1 6 x y - 2 y - 3 x

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3 years ago

Factor the trinomial 5x^2-x-4

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Step-by-step explanation:

$5x^2-x-4\\\\\mathrm{Break\:the\:expression\:into\:groups}\\=\left(5x^2+4x\right)+\left(-5x-4\right)\\\\\mathrm{Factor\:out\:}x\mathrm{\:from\:}5x^2+4x\mathrm{:\quad }x\left(5x+4\right)\\\mathrm{Factor\:out\:}-1\mathrm{\:from\:}-5x-4\mathrm{:\quad }-\left(5x+4\right)\\\\=x\left(5x+4\right)-\left(5x+4\right)\\\\\mathrm{Factor\:out\:common\:term\:}5x+4\\=\left(5x+4\right)\left(x-1\right)$