Resolve the following
vii) 4x²y²+36xy²+81y²
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Step-by-step explanation:
y²[4x²+36xy+81]
y²[(2x)²+2(2x)(9)+(9)²]
y²[(2x+9)²] [Using identity (a+b)²=a²+2ab+b²]
y²(2x+9)(2x+9)
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