Question

Un número que de 10 al multiplicarlo y 31 al sumarlo auidaaa

Answer 1

a*b=10
a+b=31

a=31-b
b*(31-b) = 10
-b²+31b-10 = 0

b = {-31+-√(31²-(4*-1*-10))} / (2*-1)
b = {-31+-√(961-40)} / -2
b = {-31+-√921} / -2
b = {-31+-30.348} / -2
b₁ = {-31-30.348} / -2 = -61.348/-2 = 30.674
b₂ = {-31+30.348} /-2 =  -0.652/-2 = 0.326

Comprobación:
30.674*0.326 = 10
30.674+0.326 = 31

Los dos números son:
30.674 y 0.326