
1.x^2+7x+12=0 2.h^2+12h+36=0 3.x^-49=0 4.2x^2+8x-42=0 5.5x^2-9x-2=0 6.4y^2=12-13y
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1.x^2+7x+12=0
(x+3)(x+4)=0
x1=-3 x2=-4
2.h^2+12h+36=0
(h+6)^2=0
h=-6
3.x^-49=0
(x+7)(x-7)=0
x1=-7 x2=7
4.2x^2+8x-42=0
x^2+4x-21=0
(x+7)(x-3)=0
x1=-7 x2=3
5.5x^2-9x-2=0
(5x+1)(x-2)=0
x1=-1/5 x2=2
6.4y^2=12-13y
4y^2+13y-12=0
(x+4)(4x-3)=0
x1=-4 x2=3/4
(x+3)(x+4)=0
x1=-3 x2=-4
2.h^2+12h+36=0
(h+6)^2=0
h=-6
3.x^-49=0
(x+7)(x-7)=0
x1=-7 x2=7
4.2x^2+8x-42=0
x^2+4x-21=0
(x+7)(x-3)=0
x1=-7 x2=3
5.5x^2-9x-2=0
(5x+1)(x-2)=0
x1=-1/5 x2=2
6.4y^2=12-13y
4y^2+13y-12=0
(x+4)(4x-3)=0
x1=-4 x2=3/4
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