解下列方程(1)(x+1)2-144=0(2)x2-4x-32=0(3)3(x-2)2=x(x-2)(4)(x+3)2=2x+5
解下列方程(1)(x+1)2-144=0(2)x2-4x-32=0(3)3(x-2)2=x(x-2)(4)(x+3)2=2x+5....
解下列方程(1)(x+1)2-144=0(2)x2-4x-32=0(3)3(x-2)2=x(x-2)(4)(x+3)2=2x+5.
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(1)(x+1)2-144=0,
(x+1)2=144,
x+1=±12,
x1=-13,x2=11.
(2)x2-4x-32=0,
(x-8)(x+4)=0,
x1=8,x2=-4;
(3)3(x-2)2=x(x-2),
3(x-2)2-x(x-2)=0,
(x-2)(3x-6-x)=0,
(x-2)(2x-6)=0,
x-2=0或2x-6=0,
x1=2,x2=3.
(4)(x+3)2=2x+5,
x2+6x+9-2x-5=0,
x2+4x+4=0,
(x+2)2=0,
x=-2.
(x+1)2=144,
x+1=±12,
x1=-13,x2=11.
(2)x2-4x-32=0,
(x-8)(x+4)=0,
x1=8,x2=-4;
(3)3(x-2)2=x(x-2),
3(x-2)2-x(x-2)=0,
(x-2)(3x-6-x)=0,
(x-2)(2x-6)=0,
x-2=0或2x-6=0,
x1=2,x2=3.
(4)(x+3)2=2x+5,
x2+6x+9-2x-5=0,
x2+4x+4=0,
(x+2)2=0,
x=-2.
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