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x² + 8x + 16
(a - 5)² = a² - 2 (a) (5) + 5²
a² - 10a + 25
(a + 2) × (a - 2)= a² - 2²
a² - 4
(x + y) × (x - y) = x² - y²
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x² + 2x × 4 + 4²
16 + x² + 8x
x² + 8x + 16.
2. (a - 5)²
a² + 2a × (-5) + (-5)²
25 + a² + (-10)a
a² - 10a + 25.
3. (a + 2) × (a - 2)
a² - a × 2 + 2a - 4
a² - 2a + 2a - 4
a² - 4.
4. (x + y) × (x - y)
(Con X)
x² - xy + yx - y²
x² - y² - yx + yx
x² - y²
(Con Y)
(y + x)(-y + x)
-y² + yx - xy + x²
-y² + x² + xy - xy
-y² + x².
- Suerte! :)