Question

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$( - \frac{2}{3}a + \frac{7}{3}b) ^{2}$
Respuesta con procedimiento.​

Answer 1

$( - \frac{2}{3}a + \frac{7}{3}b) ^{2} =$

$= ( \frac{7}{3} b - \frac{2}{3} a {)}^{2}$

$= ( \frac{7}{3} b {)}^{2} - 2 \times \frac{7}{3} b \times \frac{2}{3} a + ( \frac{2}{3} a {)}^{2}$

$= \frac{49}{9} {b}^{2} - \frac{28}{9} ab + ( \frac{2}{3} a {)}^{2}$

$= \frac{49}{9} {b}^{2} - \frac{28}{9} ab + \frac{4}{9} {a}^{2}$

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$\fcolorbox{violet}{pink}{ -- Answer By @balQis01 || Brainly -- }$