Question 655558
A number: x
The sum of a number and 2: x+2
The sum of a number and 2 multiplied by the number: (x+2)*x  <== Note the parentheses!
3 subtracted from the sum of a number and 2 multiplied by the number: (x+2)*x-3<br>
Now just simplify.
(x+2)*x-3
Using the Distributive Property to multiply:
{{{x^2+2x-3}}}
None of the remaining tgerms are like terms so we are finished simplifying.