I need help with algebra

x³ + 3x² - 5

Step-by-step explanation:

(x³ - 5x + 4) + (2x² + 5x - 6) - (-x² + 3)

x³ - 5x + 4 + 2x² + 5x - 6 + x² - 3

x³ + 3x² - 5

We are given [ H(x) = A(x) + B(x) - C(x) ]. Substitute with the given functions.

H(x) = (x³ - 5x + 4) + (2x² + 5x - 6) - (-x² + 3)

~Simplify

H(x) = (x³ - 5x + 4) + (2x² + 5x - 6) + (x² - 3)

~Combine like terms

H(x) = x³ + (2x² + x²) + (-5x + 5x) + (4 - 6 - 3)

~Simplify

H(x) = x³ + 3x² - 5

The answer is x³ + 3x² - 5

Best of Luck!

im not quite sure if this is right but i got 5.6 oisutuve

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