subtract the sum of
3x-4y-7z²and 2x+3y-4z² from 9x+2y-3z²
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Answer:
4x + 3y + 8z²
Step-by-step explanation:
Part 1 (Sum)
3x - 4y - 7z² + 2x + 3y - 4z²
= (3x + 2x) + (-4y + 3y) + (-7z² - 4z²)
= 5x - y - 11z²
Part 2 (Difference)
9x + 2y - 3z² - (5x - y - 11z²)
= 9x + 2y - 3z² - 5x + y + 11z²
= (9x - 5x) + (2y + y) + (-3z² + 11z²)
= 4x + 3y + 8z²
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