To factor out the quadratic expression x^2 - 11x + 28, we need to find two binomial factors that multiply to give us this expression. The factors are (x-4)(x-7).
(x-4)(x-7)
-2x+12x+28=10x+28 ;Combining like factors2(5x+14) ; Factor out a two from both of them
6x2=12 2x-28=?
7(x + 4)
7(y + 4)
It is 7*(12 + 4).
-28
-28
4(7 + 5)
(2z - 7)(z + 4)
(x - 14)(x - 2)
I would do this. Multiply through by -1 -1 ( -X^2 +12X +28 ) = X^2 -12X -28 (X+2)(X-14)
(x-4) (x+7)