Ответ:
1) x²-x-12=0
x²+3x-4x-12=0
(x+3)·(x-4)=0
x1= -3; x2=4
2) x²+5x+6=0
x²+3x+2x+6=0
(x+3)·(x-16)=0
x1= -3; x2= -2
3) x²-15x-16=0
x²+x-16x-16=0
(x+1)·(x-16)=0
x1= -1; x2=16
4) -x²+2x+24=0
x²-2x-24=0
x²+4x-6x-24=0
(x+4)·(x-6)=0
x1= -4; x2= 6
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Ответ:
1) x²-x-12=0
x²+3x-4x-12=0
(x+3)·(x-4)=0
x1= -3; x2=4
2) x²+5x+6=0
x²+3x+2x+6=0
(x+3)·(x-16)=0
x1= -3; x2= -2
3) x²-15x-16=0
x²+x-16x-16=0
(x+1)·(x-16)=0
x1= -1; x2=16
4) -x²+2x+24=0
x²-2x-24=0
x²+4x-6x-24=0
(x+4)·(x-6)=0
x1= -4; x2= 6