运用完全平方公式计算(1)(3a+b)2(2)(-x+3y)2(3)(1/2x-2y)2(4) (b+c)(-b-c)(5)(x+1/x)2解方程:(x+5)(x-5)-(x-1)2=24
问题描述:
运用完全平方公式计算
(1)(3a+b)2
(2)(-x+3y)2
(3)(1/2x-2y)2
(4) (b+c)(-b-c)
(5)(x+1/x)2
解方程:(x+5)(x-5)-(x-1)2=24
答
(1)(3a+b)2
(2)(-x+3y)2
(3)(1/2x-2y)2
(4) (b+c)(-b-c)
(5)(x+1/x)2
解方程:(x+5)(x-5)-(x-1)2=24
答
1.9a²+b²+6ab2.x²+9y²-6xy3.1/4x²+4y²-2xy4.-(b+c)²=-b²-c²-2bc5.x²+1/x²+16.x²-25-(x-1)²=24x²-(x-1)²=49(x+x-1)(x-x...