The product of two numbers is 24 find the numbers if one number is two more than twice the other.

2 Answers | Add Yours

justaguide's profile pic

justaguide | College Teacher | (Level 2) Distinguished Educator

Posted on

Let the numbers be A and B.

The product of the two numbers is 24

=> A*B = 24

One number is 2 more than twice the other

=> A = 2 + 2*B

substitute this in A*B = 24

=> (2 + 2*B)*B = 24

=> 2B + 2B^2 = 24

=> B^2 + B - 12 = 0

=> B^2 + 4B - 3B - 12 = 0

=> B(B + 4) - 3(B + 4) = 0

=> (B - 3)(B + 4) = 0

=> B = 3 and B = 4

A = 8 and A = 6

The numbers are (3, 8) and (4, 6)

hala718's profile pic

hala718 | High School Teacher | (Level 1) Educator Emeritus

Posted on

Let the numbers be x and y

Given that the product is 24.

==> x*y = 24.............(1)

Now we know that one number is 2 more than twice the other number.

==> x = 2y+ 2 ..............(2)

We will substitute (2) into (1).

==> (2y+2)*y = 24

==> 2y^2 + 2y = 24

We will divide by 2.

==> y^2 + y= 12

==> y^2 +y - 12 = 0

==> (y+4)(y-3) = 0

==> y1= -4  ==>  x1= 2*-4+2 = -6

==> y2= 3  ==> x2= 2*3+2 = 8

Then we have two sets of solution.

==> The numbers are 3 and 8   OR   -4 and -6.

We’ve answered 318,994 questions. We can answer yours, too.

Ask a question