x2 - 8x = x*x - 8*x = x*(x - 8)
x(x - 8)
4X^2 - 8X factor out 4X 4X(X - 2)
5 - 8x + 3x2 = 3x2 - 8x + 5 (since the sign of the second term is negative, then 5 can be factored as (-1)(-5)) = (3x - )(x - ) (try to put 1 or 5 to the empty places, in order to obtain -8x) = (3x - 5)(x - 1)
(x + 1)(x - 8)
x squared minus 12 x plus 36 = (x - 6)(x - 6)
(x - 2)(2x + 3)
(8x - 3)(8x + 3)
(x-3)(3x+1)
(x - 5)(x - 3)
What about it? Factorise it?
Find out what two numbers add up to -8 yet when mutiplied they produce 12 and so: x squared-8x+12 = (x-2)(x-6) when factored
4X^2 - 8X factor out 4X 4X(X - 2)
3x2 - 8x = x(3x - 8)
x - 3
x - 5
x=3
x2-9x+8=0 has two solutions:x = 8x = 1
x^2 +8x -9 is equivalent to (x+9)(x-1) when factored