SOLUTION: What are two numbers that when you multiply equal 54 and when you add equal negative 21?

SOLUTION: What are two numbers that when you multiply equal 54 and when you add equal negative 21?

Algebra.Com

Question 422272: What are two numbers that when you multiply equal 54 and when you add equal negative 21?
Answer by mananth(16946) (Show Source): You can put this solution on YOUR website!
xy=54
x= 54/y
x+y=-21
substitute the value of x
54/y+y=-21
(54+y^2)/y=-21
(54+y^2)=-21y
y^2+21y+54=0
y^2+18y+3y+54=0
(y+18)(y+3)=0
y = -18 OR -3
x= -3 OR -18
RELATED QUESTIONS
What are factors of -36 that when you add them it will equal -36 and when you multiply... (answered by josmiceli)

What are the conditions when the sum of a positive number and several negative numbers... (answered by lkayestanton)

What are two numbers multiplied together when you get negative 270 but when you add you... (answered by Alan3354)

what two numbers when multiplied together equal 875 and when added together equal... (answered by math_helper)

What are two numbers that when added equal -150 and when multiplied equal... (answered by Alan3354)

what are two numbers that when multiplied equal -40 and when added equal -3 (answered by tommyt3rd)

What are two numbers that when multiplied they give you negative 160 but add up to... (answered by Simnepi)

When you multiply the two numbers you get a product of 225. When you add these same two... (answered by Alan3354)

Think of two numbers. When you add them you get 6.5. When you multiply you get 0.64. What (answered by edjones)