How do you simplify $-3z + 8(z + y) 5z$ ?

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Answer 1 · 2015-09-04T11:19:44

$=color(blue)(−3z+40 z^2 +40yz$

$−3z+color(blue)(8)(z+y)5z$

$−3z+color(blue)((8 * 5z))(z+y)$

$−3z+color(blue)((40z))(z+y)$

Multiplying $color(blue)(40z)$ with both terms within the bracket

$−3z+color(blue)((40z)) * (z) +color(blue)((40z))*(y)$

$=color(blue)(−3z+40 z^2 +40yz$

How do you simplify -3z + 8(z + y) 5z-3z + 8(z + y) 5z?