The answer is 3 because x is -7. I hope this helps!
1. I think this one is 1/3
2. 38 feet
The first one is 21.93 rounded up to 22.
For this case what you should do is:
1) Multiplication of terms within parentheses correctly.
2) Rewrite the expression respecting power properties.
3) Add or subtract terms of equal power.
Note: See attached image.
Answer:
x ^ 3 + 3x ^ 2 -16x - 48 = 0