解方程:(x+7)(x+5)-(x+1)(x+5)=42
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解方程:(x+7)(x+5)-(x+1)(x+5)=42解方程:(x+7)(x+5)-(x+1)(x+5)=42解方程:(x+7)(x+5)-(x+1)(x+5)=42x^2+12x+35-(x^2+
解方程:(x+7)(x+5)-(x+1)(x+5)=42
解方程:(x+7)(x+5)-(x+1)(x+5)=42
解方程:(x+7)(x+5)-(x+1)(x+5)=42
x^2 +12x+35 -(x^2 +6x+5)=42
x^2 +12x+35-x^2-6x-5=42
6x=12
x=2
(x+5)(x+7-x-1)=42
(x+5)6=42
x+5=7
x=2
x~+12x+35-(x~+6x+5)=42
6x=12
x=2
(X+7)*(X+5)-(X+1)(X+5)=42
(X+5)*(X+7-X-1)=42
(X+5)*6=42
X+5=7
X=2
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