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Question
Expand `("x"+1/2)^2`
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Solution
It is known that (a + b)2 = a2 + 2ab + b2 and (a − b)2 = a2 − 2ab + b2.
`("x"+1/2)^2`
= `("x")^2+2xx("x")xx(1/2)+(1/2)^2`
= `"x"^2+"x"+1/4`
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