9y²-6y 1因式分解
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x^6-y^6=(x^3+y^3)(x^3-y^3)=(x+y)(x-y)(x^2+xy+y^2)(x^2xy+y^2)=(x+y)(x-y)(x^2+xy+y^2/4+3*y^2/4)(x^2-xy
(2x-3)(3y+2)-1=0
(x-y)^2-6(x^2-y^2)+9(x-y)^2=(x-y)(x-y-6x-6y+9x-9y)=(x-y)(2x-16y)=2(x-y)(x-8y)
解题思路:本题主要利用完全平方公式进行因式分解即可求出结果解题过程:解:x²-6xy+9y²=(x-3y)2
解题思路:此题主要考查了利用完全平方公式分解因式,正确记忆完全平方公式是解题关键.解题过程:
9(x+y)^2-6(x+y)+1=【3(x+y)-1】²
4x^4+6x^2y-9y^4-9y^3=4x^4-9y^4+6x²y-9y³=(2x²+3y²)(2x²-3y²)+3y(2x²
x^2-6xy+9y^2+x^2y-9y^3=(x-3y)^2+y(x^2-9y^2)=(x-3y)^2+y(x+3y)(x-3y)=(x-3y)(x-3y+xy+3y^2)
(y²-1)²-6(y2-1)+9=(y²-1-3)²=(y²-4)²=(y+2)²(y-2)²
(x-y)x^6+(y-x)y^6=(x-y)x^6-(x-y)y^6=(x-y)(x^6-y^6)=(x-y)(x³+y³)(x³-y³)=(x-y)(x+y
(x+y)ˆ2-2(x+y)(x-y)+(x-y)ˆ2=(x+y-x+y)^2=(2y)^4=4y^2如果满意请点击右上角评价点【满意】即可~再问:这个我看不懂,能不能写下来啊,谢
原式=-y(9x²-6xy+y²)=-y(3x-y)²
原式=(x+y)²+(x+y)-6=(x+y+3)(x+y-2)
(x+y)²+6(x+y)+9=(x+y)²+2×3(x+y)+3²(把x+y看成一个整体)=(x+y+3)²(完全平方公式)‘再问:2×3(x+y)怎么化进去
原式=-[(x-y)^2-6(x-y)+9]=-(x-y-3)^2.
原式=(3x+3y-1)(3x+3y+1)标准的十字相乘法.
(x-y)²+6(x-y)+9=(x-y)²+2(x-y)×3+3²=[(x-y)+3]²=(x-y+3)²
学习愉快!
=6(x-y)³-15(x-y)²+9(x-y)³=15(x-y)³-15(x-y)²=15(x-y)²(x-y-1)
(m-n)²+2(n-m)=_______=(m-n)²-2(m-n)=(m-n-2)(m-n)x²-y²+6y-9=______=x²-(y