答:
(x²+3x-2)(x²+3x+4)-16
=(x²+3x)²+2(x²+3x)-8-16
=(x²+3x)²+2(x²+3x)-6×4
=(x²+3x-4)(x²+3x+6)
=(x-1)(x+4)(x²+3x+6)
(x-y)(x-y)(y-x)(y-x) =(x-y)^5(y-x)^5 =(x-y)^5[-(x-y)]^5 =(x-y)^5[-(x-y)^5] = -(x-y)^10
2^m*2^m*4=2^8
2^2m=2^6
2m=6
m=3
(x的平方-3)的平方-x(x的平方-3)-2x的平方
=(x^2-3)^2-x(x^2-3)-2x^2
=(x^2-3-2x)(x^2-3+x)
=(x-3)(x+1)(x^2+x-3)
X÷2-3=(X+1)×1/3
|x|-5=0 分子等于0
x+5≠0 分母不等于0
∴x=5
因为(a+b)=9 ==>a+2ab+b=9 ① 又(a-b)=9 ==>a-2ab+b=1 ② 由①+②可得2a+2b=10 a+b=5 那就采纳答案吧 o(∩_∩)o
(a+b)²
=a²+2ab+b²
(a-b)²
=a²-2ab+b²
两式相加得
2a²+2b²=15+5=20
a²+b²=20÷2=10
(2a)^3*b^4/(12a^3b^2)
=2b^2/3
两个非负数相加等于0,所以a+3的绝对值=0,b-2的平方等于0.a=-3,b=2
答案是1/6