What two numbers multipy together equal 40 and add together equal 16?

Answer 1

56

Answer 2

Im guessing you're doing factoring. And there is no answer to that question. The factors of 40 are 1,2,4,5,8,10,20,40 and none of those work to add up to 16. Sorry!

THAT IS INCORRECT!!

Solve by quadratic equation ax2 + bx + c = 0

y * x = 40 so y = 40 / x

and

x + y = 16 so y = 16 - x

therefore

40 / x = 16 - x (because y = y)

so 40 = 16x - x2

so x2 - 16x + 40 = 0 (this is your quadratic equation)

The roots (the two number you are seeking) are:

12.89897948 and

3.101020514

Multiply them = 40

Add them = 16

The formula for solving x in a quadratic equation is:

x = -b plus or minus sqrt (b2 - 4ac) all divided by 2a