4+12(x-y)+9(x-y）
2个回答
4+12(x-y)+9(x-y）
=4+(12+9)(x-y)
=4+21(x-y)
相关问题
9(x-y)²-12(y²-x²)+4(x+y)²
4+9(x-y)²+12(x-y)
4+12(x–y)+9(x–y)²
9x^4+12x^2y^2+4y^4 9-12(x+y)+4(x+y)^2 x^2+2x(y+z)+(y+z)^2 36
因式分解：4+ 12（x-y)+9(x-y)(x-y)
4x*x-4x+9y*y-12y+5=0
9-12(x-y)+4(x-y)^2
4+12(x-y)+9(x-y)^2
4（x+y）^2-12(x+y)+9
因式分解：4x²-8x-12y-9y²