Question

Two numbers have a sum of 18 and a product of 72. What are the two numbers?

Answer 1

Let the number be x and y

According to question :

• x+y = 18

=> x = 18 - y ----(i)

Also,

• xy = 72

put the value of x , we get :

=>( 18-y)y = 72

=> y² -18y +72=0

=> y² -12y -6y + 72 = 0

=> y (y-12)-6(y-12) = 0

=> (y-6)(y-12)=0

=> y = 6 and 12

Put y in equation 1st we get ,

=> x = 12 and 6

Answer 2

Answer:

let the no be x And y

so x×y=72 y=72/x

now x+y =18

x+(72/x)=18

x= 12

y=6