SOLUTION: How do you foil in reverse? When two numbers multipled together equal the last number of the equation and then the same two numbers must add up to te number in the middle of the e

Question 515015: How do you foil in reverse? When two numbers multipled together equal the last number of the equation and then the same two numbers must add up to te number in the middle of the equation. Is there a trick to solving these? Example:29y+41+50
Found 2 solutions by josmiceli, Alan3354:
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
I think there is a method where complex numbers are used.
There is a book by The physicist George Gamow called
1-2-3 infinity in which he uses complex numbers to
find a buried treasure. I'm not sure if that can be directly
applied or not.
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
How do you foil in reverse? When two numbers multipled together equal the last number of the equation and then the same two numbers must add up to te number in the middle of the equation. Is there a trick to solving these? Example:29y+41+50
---------------------
If it's 2nd order, use the quadratic equation
eg, x^2 + 4x - 7
-----

Solved by pluggable solver: SOLVE quadratic equation (work shown, graph etc)

Quadratic equation (in our case ) has the following solutons:

For these solutions to exist, the discriminant should not be a negative number.

First, we need to compute the discriminant : .

Discriminant d=44 is greater than zero. That means that there are two solutions: .

Quadratic expression can be factored:

Again, the answer is: 1.3166247903554, -5.3166247903554. Here's your graph:

------------------
x^2 + 4x - 7 = (x - 1.3166)*(x + 5.3166)
------
Your example: 29y+41+50 = 29y + 91 isn't a good one.

RELATED QUESTIONS
two real numbers that have a sum of 5 and the same two numbers that multipled equal... (answered by mananth)
Explain how to reverse FOIL, when factoring a polynomial of the form ax^2 + bx + c.When... (answered by checkley77)
What two numbers added together equal -11 and then when the same two numbers are... (answered by edjones,richwmiller)
Find three consecutive numbers, that if you times the first number by two and then add... (answered by emsarj,Alan3354)
how would you reverse foil the following: 3x(cubed)-192x (answered by checkley77)
What two positive numbers when multiplied together also equal the sum of the same two... (answered by Alan3354)
if you take a certain two-digit number and reverse its digits to get another two-digit... (answered by mananth)
Please explain how to reverse FOIL when factoring a polynomial of the form ax(squared) +... (answered by stanbon,Fombitz)
Explain how to reverse FOIL when factoring a polynomial of the form ax+bx+c when a=1.... (answered by Mathtut)