Answer:
7x² - 7x + 15
Explanation:
When we add two polynomial we add the co-efficient of the like terms. i.e., the coefficients of x², x and the constant term.
Given: f(x) = 4x² - 5x + 7
and g(x) = 3x² - 2x + 8
f(x) + g(x) = 4x² - 5x + 7 + 3x² - 2x + 8
⇒ f(x) + g(x) = 7x² - 7x + 15
Hence, the answer.