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因式分解求具体过程
(z²-x²-y²)-4x²y²
ab(x²-y²)+xy(a²-b²)
已知△ABC三条边为a、b、c,且a、b满足关系式a²-6a+4b²-4b+10=0,求最长边c的取值范围
人气:456 ℃ 时间:2020-02-05 06:31:52
解答
2:abx^2-aby^2+a^2xy-b^2xy
=(abx^2+a^2xy)-(aby^2+b^2xy)
=ax(bx+ay)-by(ay+bx)
=(ax-by)(bx+ay)
3.(a-3)^2+(2b-1)^2=0
a=3,b=0.5,2.5第一小题是题目有问题吗
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