(x + 7)(x - 6)
44
-x2 + x + 42= -x2 + 7x - 6x + 42= 7x - x2 + 42 - 6x= x(7 - x) + 6(7 - x)= (7 - x)(x + 6)
X2 + 19X - 42 = 0What two factors of - 42 add up to 19?(X - 2)(X + 21)----------------------FOIL and see the function reappear.X = 2X = - 21
= -(x - 7)(x + 6)
It is: (x+7)(x-6) when factored
(x + 7)(x - 6)
44
(x - 6)(x - 7)
-x2 + x + 42= -x2 + 7x - 6x + 42= 7x - x2 + 42 - 6x= x(7 - x) + 6(7 - x)= (7 - x)(x + 6)
X2 + 19X - 42 = 0What two factors of - 42 add up to 19?(X - 2)(X + 21)----------------------FOIL and see the function reappear.X = 2X = - 21
Factor x2 plus 12xp plus 36p2 is (x+6p)(x+6p).
= -(x - 7)(x + 6)
(x + 6) (x - 7)
(-x-6)(x-7)
(x - 7)(x + 6)
If that's x^2 + x - 42, that factors to (x + 7)(x - 6)