(3x-4y)(5x-4y)-(7x-8y)(6y-5x)
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(3x-4y)(5x-4y)-(7x-8y)(6y-5x)
(3x-4y)(5x-4y)-(7x-8y)(6y-5x)
(3x-4y)(5x-4y)-(7x-8y)(6y-5x)
(3x-4y)(5x-4y)-(7x-8y)(6y-5x)
=15x²-12xy-20xy+16y²-(42xy-35x²-48y²+40xy)
=15x²+35x²-32xy-42xy-40xy+16y²+48y²
=50x²-114xy+64y²
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3x-4y)(5x-4y
(3x-4y)(5x-4y)-(7x-8y)(6y-5x)
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因式分解(x-2y)(x-3y)+(x-4y)(x-5y)+(x-3y)(x-5y)+(x-2y)(x-4y)
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x-4y分之3x + 4y-x分之x+y - x*x-4y分之7y
3x+2=y 5x+4=y 7x+6=y 9x+8=y 11x=y 联立方程 有的话
3x+2=y 5x+4=y 7x+6=y 9x+8=y 11x=y
3x+2=y 5X+4=Y 7X+6=Y 9X+8=y 11x=y要如何计算
3x+2=y 5x+4=y 7x+6=y 9x+8=y 11x=y怎么解
y-3x=2,y-5x=4,y-7x=6,y-9x=8,y-11x=0方程组,无
已知实数x.y满足根号(x+y-8)+根号(8-x-y)=根号(3x-y-4)+根号(x-2y+7),求x,y
x^8-x^7y+x^6y^2-x^5y^3+x^4y^4-x^3y^5+x^2y^-xy^7+y^8因式分解(过程)
求此函数表达式X:0 Y:0x:1 y:0x 3 y 4x 4 y 8x 5 y 16x 6 y 30x 7 y 53
1.解方程组{x+y=7,3x+y=172.{x+y=4,2x-y=53.{3x+2y=5x+2,2(3x+2y)=2x+8
-(5x+y)-7(x-y) -2分之1(x+y)+4分之1(x+2y) 4x-2(x-2) -2x-(3x-1) x-(5x-2y)+2(2x-y)
例X=1 y=21.X+Y=5 X-Y=15 2.2X+3Y=4 5X+6Y=7 3.X+3Y=5 3X+Y=-1 4.2X+Y=3 3X+5Y=11 5.4X+3Y=6 2X+Y=4 6.X+Y=180 X=3Y-10 7.3X-2Y=3 2X-Y=7 8.5X+3Y=7Y X+Y=45 9.3X+4Y=126X+8Y=24 X:6Y=1:4 10.X+Y=138 X-45=Y+53 11.X+Y=60 14Y=20X 12.2X+3Y=15.5 5X+6Y=35 13.X+Y=170 3