Quadratics by factoring (intro)
What two numbers multiply to give 12 and add to give 7?
3 and 4
factor x^2−3x−18.
(x−6)(x+3)
If (x−4)(x+2)=0, what are the solutions for x?
x=4 or x=−2
What is the factored form of x^2+5x+6?
(x+2)(x+3)
Factor x^2+8x+15.
(x+3)(x+5)
Solve (x+5)(x−3)
x=−5 or x=3
Factor the quadratic x^2+7x+12
(x+3)(x+4)
Factor x^2−9x+20.
(x−4)(x−5)
Solve (x−2)(x+6)
x=2 or x=−6
Factor x^2−10x+21
(x−3)(x−7)
Factor x^2+7x−30.
(x+10) (x-3)
Solve (2x+3)(x−1)=0
x=−2/3 or x=1
Factor x^2−5x−14
(x−7)(x+2)
Factor x^2−11x+24
(x−8)(x−3)
(x^2−9)(x+4)=0
x=3, x=−3 or x=−4