moesha1759 moesha1759
  • 16-10-2021
  • Mathematics
contestada

The product of two whole numbers is 684 and their sum is 56. What are the two numbers ?

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Vitor23
Vitor23 Vitor23
  • 17-10-2021

Answer:

38, 18

Step-by-step explanation:

In order to solve this, we need to use what is called a simultaneous equation.

Lets call our two numbers a and b.

We know that:

[tex]ab=684\\\\\\a+b=56[/tex]

So we pick an equation to rearrange for either a or b Lets say the 2nd one.

[tex]a=56-b\\[/tex]

Now, we plug this equation into the other one, and expand it into a quadratic and solve.

[tex]b(56-b)=684\\-b^2+56b=684\\\\-b^2+56b-684=0\\[/tex]

Using the quadratic equation, we get that the answer is 38 and 18.

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