What is the mean of (a+b)²
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Explanation:
(a+b)2
(a+b)(a+b)……. Multiply
a*a=a2……….(1)
a*b=ab……….(2)
b*a=ba=ab……..(3)
b*b=b2…………(4)
Adding equation of (1),(2),(3)&(4)
a2+ab+ab+b2
a2+2ab+b2
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a²+b²+2ab....... good night
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