Question

what is formula of
${a}^{2} + {b}^{2}$
​

Answer 1

Step-by-step explanation:

$a {}^{2} + b {}^{2}$

add and subtract by 2ab

$a {}^{2} + b {}^{2} + 2ab - 2ab$

$(a + b) {}^{2} - 2ab$

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Answer 2

Answer:

* a² + b² = ( a + b)² - 2ab

also,

a² + b² = ( a - b)² + 2ab.

Step-by-step explanation:

some other formulas of algebra:

* ( a + b)² = a² + b² + 2ab

* ( a - b)² = a² + b² - 2ab

* ( a + b)³ = a³ + b³ + 3a²b + 3ab²

* ( a - b)³ = a³ - b³ - 3a²b + 3ab²

* ( a³ + b³) = (a + b)( a² + b² - ab)

* ( a³- b³) = ( a - b)( a² + b² +ab).

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