Question

`V = 3b + 2b^2` What is the value of V when b = –4?

Answer 1

`V = 3b + 2b^2`

So when `b=-4` we have;

`V = 3(-4) + 2(-4)^2`
`:. V = -12 + 2(-4)(-4)`
`:. V = -12 + 2(16)`
`:. V = -12 + 32`
`:. V = 20`