a^2 + 2ab + b^2 = ? (formula and example) [factoring a trinomial]

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Transcript:
Slide 02:
a squared
plus two a b
plus b squared is
a plus b squared.

Slide 03:
Example:
x squared
plus six x
plus nine is

x squared
plus two times x times three
plus three squared.

Slide 04:
Which is,
x plus three squared.

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