Question

ayuda xfas, es para unas horas

Answer 1

Explicación paso a paso:

Tu ejercicio 1 es simple

(2/3x +7)² = usando (a+b)² = a² +2ab + b²

= (4/9)x² + 2(2/3)x × 7 + 7²

=

$\frac{4}{9} x {}^{2} + \frac{28}{3} x + 49$

eso sería

Answer 2

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