Question

ayuda, con procedimiento​

Answer 1

Respuesta:

$a1 = (10x + 2 ) \times 2x \\ = 20 {x}^{2} + 4x$

$a2 = (5x + 2) \times 4x \\ = 20 {x}^{2} + 8x$

$a3 = 3x \times 4x = 12 {x}^{2}$

$20 {x}^{2} + 4x + 20 {x}^{2} + 8x + 12 {x}^{2} \\ 52 {x}^{2} + 12x$