(3x+y)(3x-7y)
3个回答
(3x+y)(3x-y)
=9x²-3xy+3xy-y²
=9x²-y²
相关问题
(-7x-3y)(-7x-3y)(-7x+3y)(-7x+3y)=?
3X-2Y=12X+3Y=-7╭3X-2Y=1╰2X+3Y=-7
2x+3Y=-5 x+3y=-7 x-y=3
(x3-2y3-3x2y)-(3x3-3y3-7x2y)
3x=7y,x与y成()比例3x=7y,x:y=():(),x与y成()比例
x+y=3x+7y=4求出x+y=3x+7=4的解正确题目是x+y=3x+7y=4
18(x+y)^8(x-y)^7÷[3(x+y)^3(x-y)^3]^2
(3x+7y)(-3x-7y)要过程!
试说明:多项式(5x³-7x³y+3x²y)+2x³-(-7x³y+3
3(x-3y)^7/[-2(x-3y)^3]