Question

Find the sum: (3x^2 - 4x + 8) + (x^2 + x - 5)

Answer 1

4x² -3x +3

1) Adding those trinomials step by step

(3x² - 4x + 8) + (x² + x - 5)​ Remove the parentheses since there's no multiplication

3x²- 4x + 8 + x² + x - 5 Combine like terms

3x² +x² -4x +x +8 -5 Rewrite them orderly

4x² -3x +3

2) So the sum of those trinomials yields 4x² -3x +3