Question

probar que
$(a - b) {}^{2} = a {}^{2} - 2ab + b {}^{2}$
ayudenme plis​

Answer 1

$(a−b) ^{2} = {a}^{2} −2ab+ {b}^{2}$

resolvemos

$(a−b) ^{2} = {a}^{2} −2ab+ {b}^{2} \\ {a}^{2} - 2ab + {b}^{2} = {a}^{2} - 2ab + {b}^{2} \\ \boxed{\mathbf{ \green{0 = 0}}}$

usamos la fórmula cuadratica

$\boxed{ \mathbf{ {(x - y)}^{2} }} = \blue{ {x}^{2} - xy + {y}^{2}}$

Respuesta: Es verdadero

espero haberte ayudado :3