解方程 1.36x^2-1=0 2.4x^2=81 3.(x+5)^2=25 4.x^2+2x+1=4

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解方程1.36x^2-1=02.4x^2=813.(x+5)^2=254.x^2+2x+1=4解方程1.36x^2-1=02.4x^2=813.(x+5)^2=254.x^2+2x+1=4解方程1.3

解方程 1.36x^2-1=0 2.4x^2=81 3.(x+5)^2=25 4.x^2+2x+1=4
解方程 1.36x^2-1=0 2.4x^2=81 3.(x+5)^2=25 4.x^2+2x+1=4

解方程 1.36x^2-1=0 2.4x^2=81 3.(x+5)^2=25 4.x^2+2x+1=4
(1)36x^2-1=0;
x^2=1/36
x=±1/6
(2)4x^2=81;
x^2=81/4
x=±9/2
(3)(x+5)^2=25
x+5=±5
x1=-10,x2=0
(4)x^2+2x+1=4.
(x+1)^2=4
x+1=±2
x1=-3,x2=1