问题:
(1)已知x+5y=6,求x 2+5xy+30y的值.
(2)已知a+2b=0,求a 3+3a 2b+2ab 2的值.
(1)已知x+5y=6,求x 2+5xy+30y的值.
(2)已知a+2b=0,求a 3+3a 2b+2ab 2的值.
(2)已知a+2b=0,求a 3+3a 2b+2ab 2的值.
参考答案: