Answer:
It would be -2.
Step-by-step explanation:
<u>Key skills: Conjugate, Distribution Property, and Addition/Subtraction </u>
3 + is your expression. The conjugate is an important concept you need to know to solve this.
Given the expression:
It's conjugate would be:
(Basically if there is an addition sign between the 2 terms, it would become a subtractions symbol and if there is a subtraction symbol it would become an addition symbol)
1) So the conjugate of would be
2) Now we would have to multiply them
- (
)(
) is your expression.
- If you use distribution property, you will get to:
- The two middle terms would cancel out (they both add up to 0), so then we have
- This would simplify into 9-11, which is then <u><em>-2</em></u>
Hope you understood, and have a nice day!! :)