Question

the sum of two number is 18 and their product is 45 find the number​

Answer 1

x +y=18. xy=45

x-18=y. x=45/y

45/y-18=y

45-18y=y^2

y^2+18y-45=0

y=3,15 and x also has same values.

so x is 3 then y is 15 or x is 15 then y is 3.