已知x+y=m,求(x+y)³(2x+2y)²(3x+3y)²的值.
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已知x+y=m,求(x+y)³(2x+2y)²(3x+3y)²的值.
已知x+y=m,求(x+y)³(2x+2y)²(3x+3y)²的值.
已知x+y=m,求(x+y)³(2x+2y)²(3x+3y)²的值.
原式=(x+y)^3*(2(x+y))^2*(3(x+y))^2
=(x+y)^3*4*(x+y)^2*9*(x+y)^2
=36(x+y)^7
因为x+y=m
所以原式=36m^7
代入 得 m^3*(2m)^3*(3m)^3= m^3*8m^3*27m^3=216m^9
答案是36m^7
(x+y)³(2x+2y)²(3x+3y)²
=(x+y)³[2²(x+y)²][3²(x+y)²]
=(m)³[4(m)²][9(m)²]
=36m的(3+2+2)次方
=36m的7次方