计算 3(2x-7y)(7y+2x)+(4x+5y)(-5y-4x)
来源:学生作业帮助网 编辑:六六作业网 时间:2024/12/23 08:34:19
计算3(2x-7y)(7y+2x)+(4x+5y)(-5y-4x)计算3(2x-7y)(7y+2x)+(4x+5y)(-5y-4x)计算3(2x-7y)(7y+2x)+(4x+5y)(-5y-4x)3
计算 3(2x-7y)(7y+2x)+(4x+5y)(-5y-4x)
计算 3(2x-7y)(7y+2x)+(4x+5y)(-5y-4x)
计算 3(2x-7y)(7y+2x)+(4x+5y)(-5y-4x)
3(2x-7y)(2x+7y)+(4x+5y)(-5y-4x)
=3((2x)^2-(7y)^2)-(4x+5y)^2
=3(4x^2-49y^2)-(16x^2+25y^2+40xy)
=-4x^2-172y^2-40xy
3(2x-7y)(7y+2x)+(4x+5y)(-5y-4x)
=3(2x-7y)(2x+7y)-(4x+5y)²
=3(4x²-49y²)+(16x²+40xy+25y²)
=12x²-147y²+16x²+40xy+25y²
=28x²+40xy-122y²
计算:(x-y)^7÷(y-x)^6+(-x-y)^3÷(x+y)^2
计算(x-y)^7÷(y-x)^6+9-x-y)^3÷(x+y)^2
计算(x^8-x^7y+x^5y^3-x^4y^4+x^3y^5-x^y^7+y^8)(x^2+xy+y^2)
-2x(3x-7y)+(x-y)(x^2+xy+y^2) 计算
计算:1/(x-y)-1/(x+y)-2y/(x^2+y^2)-4y^3/(x^4+y^4)-8x^7/(x^8+y^8)
计算:(x+3y)(2x-y)
计算:(2x-3y)(x+y)
计算:(-x-2y) * (3x-y)
计算:(x+y)-3(x-2y).
(x-y)^2+7(x+y)-11(x-y)^2-8(X+Y)的计算过程
计算3x-2y-(9x-7y)+2(4x-5y)
计算2/3x-2/x+y(x+y/3x-x-y)/x-y/x
计算(x+y)(x+y)^2(-x-y)^3
3x(x-y)+2y(x-y) 计算
计算(21x^4y^3-35x^3y^2+7x^2y^2)/(-7x^2y)
计算 3(2x-7y)(7y+2x)+(4x+5y)(-5y-4x)
计算:x+2y/x-y+2x/y-x-3y/x-y
计算:(x—y)^7÷(y—x)^6+(—x—y)^3÷(x+y)^2