(x+y)方-16(x-y)方
(9x方-4y方)(9x方-4y方)
因式分解(x方+y方)(x方+y方-4)+4
因式分解(x方+xy+y方)的平方-4xy(x方+y方)
因式分解(x+y+z)三次方-x三次方-y三次方-z三次方
已知:3x方+xy-2y方=0,求(x+y/x-y + 4xy/y方-x方)除以 x方+2xy-3y方 / x方-9y方
分解因式(x+y)方+4(x-y)方-4(x方-y方)
4x方-y方-4x+1(因式分解 )
25(x+y)二次方-16(x-y)二次方
0.49p方-144 (2x+y)方-(x+2y)方
(x方加y方加1)(x方加y方加3)=8则x方加y方的值为
已知(X方+y方+1)(x方+y方+3)=8,则x方+y方的值是多少?
若(x方加y方)(x方减1加y方)减12等于0,则x方加y方等于