factorize using identities 9x²y² 30xyz 25z²
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Step-by-step explanation:
9x²y²+ 30 xyz + 25 z²
(a+b)²= a²+b²+2ab
(3xy)²+ ( 5z)²+2(3xy)(5z)
= 9 x²y²+ 25z²+ 30xyz
answer = (3xy+5z)²
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