Question

Factor -4 + 8a - 4a 2.

-4(a - 1)2
-4(a + 1)2
4(a - 1)2

Answer 1

I hope this helps you

Answer 2

The factor of
`-4+8a-4a^2` is
`-4(a-1)^2`

A is correct.

Explanation:

Given:
`-4+8a-4a^2`

We need to factor the trinomial.

First we will take common factor from each term.

`\Rightarrow -4\cdot 1-4\cdot -2a-4\cdot a^2`

Take out -4 common

`\Rightarrow -4(1-2a+a^2)`

Using formula of perfect square.

`x^2-2xy+y^2=(x-y)^2`

`\Rightarrow -4(a-1)^2`

Hence, The factor of
`-4+8a-4a^2` is
`-4(a-1)^2`