Question

Factor -4 + 8a - 4a2.

Answer 1

Start by rewriting the equation:
-4a^2 + 8a - 4

Answer 2

Then, switch each sign to its opposite:
4a^2 - 8a + 4

Now you can factor it.

Answer 3

Multiply the two outside numbers together (4 and 4) = 16 and find two numbers that when multiplied equal 16 and when added equal -8.

Answer 4

They would be -4 and -4 because
-4 • -4 = 16
-4 + -4 = -8