Answer:
4x^3 + 7z - 20x + 524.
Step-by-step explanation:
(4x3 + 7z– 9x – 3) - (-523 + 11x – 4)
4x3 + 7z– 9x – 3 - (-523 + 11x – 4) Distribute the negative over the parentheses:
= 4x3 + 7z– 9x – 3 + 523 - 11x + 4
= 4x3 + 7z– 9x - 11x– 3 + 523 - 4
= 4x^3 + 7z - 20x + 524.
