Question

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

Answer 1

`=color(blue)(−3z+40 z^2 +40yz`

Explanation:

`−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`