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Question
Factorise the following, using the identity a2 + 2ab + b2 = (a + b)2.
`x^2/4 + 2x + 4`
Solution
We have,
`x^2/4 + 2x + 4`
= `(x/2)^2 + 2 * x/2 * 2 + 2^2`
= `(x/2 + 2)^2`
= `(x/2 + 2)(x/2 + 2)`
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