Question

Add: 7x³ + 2x² - 5x - 7 and -5x² + x³ + 4x - 5​

Answer 1

Step-by-step explanation:

7x^3 + 2x^2 - 5x -7

x^3 - 5x^2 + 4x -5

on adding, 8x^3 - 3x^2 - x - 12

Answer 2

Answer:

$7 {x}^{3} + 2 {x}^{2} - 5x + ( - 5 {x}^{2} + {x}^{3} + 4x - 5 \\ 7 {x}^{3} + {x}^{3} + 2 {x}^{2} - 5 {x}^{2} - 5x + 4x - 7 - 5 \\ 8 {x}^{3} - 3 {x}^{2} - x - 12 \\ thank \: you$