What is the expression for the difference between five times a number and twice that number?
2 answers:
Answer:
Step-by-step explanation:
Let's call that number .
when we are asked for a difference we must substract quantities.
In this case we need the difference between five times a number (the number is represented by ) and twice that number:
five times the number x is equal to
twice that number x is equal to:
thus, the difference is:
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In this case, we have
Those are the roots of this equation. When they ask their product, they want you to multiply both numbers.
When we multiply them:
When we FOIL the we get:
Simplify:
So the product of the two roots of this equation is 6.