Question

respuesta de
4+4=20
5+5=30
6+6=42
9+9=??

Yo pongo 74
5+5+20(suma anterior)=30

Answer 1

Solución:

4 + 4 = (4 × 4) + 4 = 16 + 4 = 20
5 + 5 = (5 × 5) + 5 = 25 + 5 = 30
6 + 6 = (6 × 6) + 6 = 36 + 6 = 42
9 + 9 = (9 × 9) + 9 = 81 + 9 = 90  ----> Rta

Answer 2

Lo que ha hecho es lo siguiente:

$4+4 = 4^{2} + 4 = 4(4+1) = 4(5) = 20$

$5+5 = 5^{2} + 5 = 5(5+1) = 5(6) = 30$

$6+6 = 6^{2} + 6 = 6(6+1) = 6(7) = 42$

$7+7 = 7^{2} + 7 = 7(7+1) = 7(8) = 56$

$8+8 = 8^{2} + 8 = 8(8+1) = 8(9) = 72$

$9+9 = 9^{2} + 9 = 9(9+1) = 9(10) = 90$

 axllxa