Question

(3x+7y)² genteeee meee ajudaaa

Answer 1

$(3x+7y)*(3x+7y)$
$9 x^{2} +3x+7y+7y+3x+49 y^{2}$
$9 x^{2} +42xy+49 y^{2}$

Answer 2

= (3x + 7y)²
= (3x + 7y).(3x + 7y)
= 3x.3x + 3x.7y + 7y.3x + 7y.7y
= 9x² + 21xy + 21xy + 49y²
= 9x² + 42xy + 49y²

ou
= (3x + 7y)²
= 9x² + 2.3x.7y + 49y²
= 9x² + 42xy + 49y²