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Question
Expand `("a"/2+"b"/3)^2`
Solution
It is known that, (a + b)2 = a2 + 2ab + b2 and (a − b)2 = a2 − 2ab + b2.
`("a"/2+"b"/3)^2`
= `("a"/2)^2+2xx("a"/2)xx("b"/3)+("b"/3)^2`
= `"a"^2/4+("ab")/3+"b"^2/9`
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