How do you combine $7 x (8 x - 3) + 5 (8 x - 3)$ $7x ( 8x - 3) + 5( 8x - 3)$ ?

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Answer 1 · 2017-11-07T00:39:08

$56 x^{2} + 19 x - 15$ $56x^2+19x-15$

You would first distribute everything in the parenthesis.

$(7 x \cdot 8 x) + (7 x \cdot - 3) + (5 \cdot 8 x) + (5 \cdot - 3)$ $(7x*8x)+(7x*-3) + (5*8x) + (5*-3)$

$56 x^{2} - 21 x + 40 x - 15$ $56x^2-21x + 40x -15$

Now just combine like terms. In this case, only $- 21 x$ $-21x$ and $40 x$ $40x$ are like terms.

$56 x^{2} + 19 x - 15$ $56x^2+19x-15$

How do you combine 7x(8x−3)+5(8x−3)7x ( 8x - 3) + 5( 8x - 3) ?