algebra 2 help!!!?

Question

evalluate the expression:
x^3+x^2+x when x= -3

simplify the expression:
3x-(4y-3x)-4y

and can you plz tell me when solving an inequality equations...why sometimes the symbol is reversed?

plz tell me

Answer 1

Question 1
x ³ + x ² + 3
(- 3)³ + (- 3)² + (- 3)
- 27 + 9 - 3
- 21

Question 2
3x - 4y + 3x - 4y
6x - 8y

Question 3 (two examples)
3x < 12
x < 4

- 3x < 12
3x > - 12
x > - 4
Note that < changes to > when both sides are multiplied by - 1

Answer 2

Pretty easy, I wish I was taking your Algebra 2. This is basic Algebra at my school. -_-

*=multi

X= -3, so you want to take -3^3 right? Here:
1)
-3*-3*-3=(-27) + -3*-3= (9) + -3



The symbols reverse because, a negative times a negative will make a positive. However, a negative times a positive will still be a negative. Parenthesis: () are just ways of showing multiplication.

So, -27+9-3 or -27+6 = -21.... -21 is your answer.

2)
3x-4y+3x-4y= 6x-8y that's your answer.

Answer 3

The symbol is reversed when you switch numbers over the inequality sign.