已知x+5y=6,求x²+5xy+30y的值
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已知x+5y=6,求x²+5xy+30y的值
已知x+5y=6,求x²+5xy+30y的值
已知x+5y=6,求x²+5xy+30y的值
x²+5xy+30y
=(x^2+5xy)+30y
=x(x+5y)+30y
=6x+30y
=6(x+5y)
=6*6
=36