Problem

Simplify the trinomial square $(x + 5)^{2}$ .

Answer

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Answer

$x^{2} + 5 x + 5 x + 25 = x^{2} + 10 x + 25$

Steps

Step 1 ： $(x + 5)^{2} = (x + 5) * (x + 5)$

Step 2 ： $(x + 5) * (x + 5) = x^{2} + 5 x + 5 x + 25$

Step 3 ： $x^{2} + 5 x + 5 x + 25 = x^{2} + 10 x + 25$

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