Could someone check my answer . you

Hello! We will be using the Pythagorean theorum, where a² + b² = c². C is the clanted part of the triangle, and 13² is 169. a = 12, and we are looking for the value of b. 12² is 144. Let's subtract to find b. 169 - 144 is 25. Now, let's find the square root of 25 to find the length. √25 is 5. There. b = 5. The side length of side b is 5. The correct answer is C: 5.

To simplify the expression:
x 3 + 3 x 2 − x + 2 x 2 + 6 x − 2

All the like terms should be combined.
3x2 and 2x2 are like terms
-x and 6x are like terms

So,
x3 + (3+2)x2 +(-1+6)x - 2
x3 + 5x2 + 5x - 2

Therefore, the answer is
A=x3 + 5x2 + 5x – 2