ROVIKULY 3.02 : x^2 + 10x + 25 = ? (problem with solution) [video] [handwritten]

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Transcript:
Please factor:
x squared
plus 10x
plus 25.

FORMULA:
a squared
plus 2 ab
plus b squared,
equals:
a plus b, all squared.

SOLUTION:
x squared
plus 10x
plus 25, equals:

x squared
plus 2 times x times 5
plus 5 squared

which equals:
x plus 5, all squared.

ANSWER:
x squared
plus 10x
plus 5,
equals:
x plus 5, all squared,
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