解方程(2X+5)^2=(1-X)^2

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解方程(2X+5)^2=(1-X)^2
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解方程(2X+5)^2=(1-X)^2
解方程(2X+5)^2=(1-X)^2

解方程(2X+5)^2=(1-X)^2

(2X+5)^2=(1-X)^2
所以 2X+5 =1-x 或 2X+5 =x-1
解得 x = -4/3 或 x = -6


(2x+5)²=(1-x)²
(2x+5)²-(1-x)²=0
[(2x+5)-(1-x)][(2x+5)+(1-x)]=0
(3x+4)(x+6)=0
∴x=-6
或x=-4/3

(2x+5)^2-(1-x)^2=0
(2x+5+1-x)*(2x+5-1+x)=0
(x+6)(3x+4)=0
x1=-6
x2=-4/3

(2X+5)^2=(1-X)^2
2x+5=1-x或2x+5=x-1
x1=-4/3, x2=-6