a) 27y⁴+36y³-54y²=9y²(3y²+____+____ ) b) 3ab(3a+b+__ ) =9a²b+___+6ab a) 27y⁴+36y³-54y²=9y²(3y²+____+____ ) b) 3ab(3a+b+__ ) =9a²b+___+6ab