填空题:9(x+2y)^2-25(x-2y)^2=[ ]^2-[ ]^29(x+2y)^2-25(x-2y)^2=[ ]^2-[ ]^2

(x-y)( )+y^2-x^2填空 填空：x-y/x+y=( )/x^2-y^2 填空题:9(x+2y)^2-25(x-2y)^2=[ ]^2-[ ]^29(x+2y)^2-25(x-2y)^2=[ ]^2-[ ]^2 填空(x+y)^2+( )=(x-y)^2 (x-y-z)*( )=x^2-(y+z)^2 填空 (x+y)(x-y)-(x-y)^2如题 (x+y)(x-y)-(x-y)^2 (x-y)(x+y)(xˇ2+yˇ2)=__________1道填空题.等于白送 13题 填空不等式|2x+y+m| 填空 (x^2-y^2)(x+y)^2=(x-y)(____)^3 2道多项式除以多项式的简单题填空(1)(3x+5y)*________=9x^2-25y^2(2) (x+y)^2-_______=(x-y)^2 填空：2x-y-（ ）=—x+2 填空(1/3x+?)(?+2y)=4Y^2-1/9x^2 填空-5/7x=( )/7x=5/( ) x-y/x+y=X^2-y^2/( )填空-5/7x=( )/7x=5/( ) x-y/x+y=X^2-y^2/( ) 填空题、化简x平方＋x【x+y】－2x平方－xy的结果是【 】. 整式乘法练习题填空题1.(x+4)(-x+4)=____.2.(x+3y)(___)=9y²-x²3.(-m-n)(___)=m²-n²4.-(2x²+3y)(3y-2x²)=____.5.(a-b)(a+b)(a²+b²)=____6.(___-2x)(___-2x)=4x²-25y²7.(xy-z)(z+xy)=____.8.(¼x+y 由-(2/1)x大于等于-2y,得x(填空题) 初中数学填空一题.!已知实数x,y满足x^2+3x+y-3=0,则x+y的最大值为多少?过程 18y(x-y)∧2-12(x-y)∧3=6(x-y)∧2_________________ 填空题 因式分解 快 一分钟之内