Examples

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

Step 1

Rewrite $25$ as $5^{2}$ .

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

Step 2

Check that the middle term is two times the product of the numbers being squared in the first term and third term.

$10 x = 2 \cdot x \cdot 5$

Step 3

Rewrite the polynomial.

$x^{2} + 2 \cdot x \cdot 5 + 5^{2}$

Step 4

Factor using the perfect square trinomial rule $a^{2} + 2 a b + b^{2} = {(a + b)}^{2}$ , where $a = x$ and $b = 5$ .

${(x + 5)}^{2}$

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