Question

-6x^2 +72x -162=0

Factor

Answer 1

-6(x-9)(x-3)

Explanation:

Divide everything by -6:

-6(x^2-12x+27)

Now we need to factor everything in the parentheses.

What are the factors of 27?

1,3,9

Notice that 9 + 3 = 12 >>> this is the coefficient of the middle term. This is our 'hint' that we can factor this equation.

So:

-6(x-9)(x-3)

Answer 2

I don't know

this not in our silabus sorry