①(x-2y+3)(x+2y-3) ②(2a+3b)^2(3b-2a)^2③(3a^2)^3-6a^3(2a^3+3a^2+a) ④(2a+b)^2-(2a+b)(2a-b)
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①(x-2y+3)(x+2y-3)②(2a+3b)^2(3b-2a)^2③(3a^2)^3-6a^3(2a^3+3a^2+a)④(2a+b)^2-(2a+b)(2a-b)①(x-2y+3)(x+2y-
①(x-2y+3)(x+2y-3) ②(2a+3b)^2(3b-2a)^2③(3a^2)^3-6a^3(2a^3+3a^2+a) ④(2a+b)^2-(2a+b)(2a-b)
①(x-2y+3)(x+2y-3) ②(2a+3b)^2(3b-2a)^2
③(3a^2)^3-6a^3(2a^3+3a^2+a) ④(2a+b)^2-(2a+b)(2a-b)
①(x-2y+3)(x+2y-3) ②(2a+3b)^2(3b-2a)^2③(3a^2)^3-6a^3(2a^3+3a^2+a) ④(2a+b)^2-(2a+b)(2a-b)
1)原式=x^2-(2y-3)^2=x^2-4y^2+12y-9
2)原式=(4a^2-9b^2)^2=16a^4-72a^2b^2+81b^4
3)原式=27a^6-12a^6-18a^5-6a^4=15a^6-18a^5-6a^4
4)原式=(2a+b)(2a+b-2a+b)=(2a+b)2b=4ab+2b^2
2(x-y)²-3(x-y)(-y-x)
计算①(2x+y-3z)²;②y(x+y)+(x-y)²-x²-2y².
x(x-y)2-(y-x)3
因式分解:① y^2-5y-50 ②x(y-x)+y(y-x)-(x-y)^2 ③3(x^2-4x)^2-48
[2/3x-2/x+y(x+y/3x-x-y)]/x-y/x
化简:{2/3x-2/(x+y)[(x+y)/3x-x-y]}/(x+y)/x
计算2/3x-2/x+y(x+y/3x-x-y)/x-y/x
化简3x-2/(x+y)[(x+y)/3x-x-y]÷(x-y)/x
(y-x)^4(x-y)^3+2(x-y)^6(y-x)
(x-y)^3×(y-x)^4+(x-y)^2×(y-x)^5
计算(x-y)^2×(x-y)^3×(y-x)×(y-x)^2
(x+y)/2- x-y/2=6 3(x+y)=4(x-y)
12(x+y)^3(y-x)/【4(x+y)^2(x-y)】
2分之x+y+3分之x-y;4(x+y)-(x-y)谢谢了,
[(3x+y)(x-y)-(2x+3y)(x-y)]*(x-y)
计算:x+2y/x-y+2x/y-x-3y/x-y
化简:(x-3y)(x+y)-(x-2y)(x+2y)-(x-y)平方
3x+y=2 -y/x+y=123x+y=2 (-y/x)+y=12