解方程:2(x-3)(x+5)=x²+ (x-2)(x+2)和(-4x-5)²=(-2x+3)(-2x-3)-2(2x+3)(-3x+5)
解方程:2(x-3)(x+5)=x²+ (x-2)(x+2)和(-4x-5)²=(-2x+3)(-2x-3)-2(2x+3)(-3x+5)
数学人气:315 ℃时间:2019-10-23 14:10:36
优质解答
2(x-3)(x+5)=x²+ (x-2)(x+2)2x²+4x-30=x²+x²-44x=30-44x=26x=6.5(-4x-5)²=(-2x+3)(-2x-3)-2(2x+3)(-3x+5)16x²+40x+25=4x²-9+12x²-2x-3040x-2x=-25-3938x=-64x=-3...
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