16. If we add, 7xy + 5yz - 3zx, 4yz + 9zx - 4y and - 3x2 + 5x – 2xy, then the answer is
A. 5xy + 9yz +3zx + 5x - 4y
B. 5xy - 9yz +3zx - 5x - 4y
C.5xy + 10yz +3zx + 15x – 4y
D. 5xy + 10yz +3zx + 5x – 6y
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Answer:
Example 1 Add: 7xy + 5yz — 3zx, 4yz + 9zx — 4y , — 3xz + 5x — 2xy.
Expressions are 7xy + 5yz — 3zx 4yz + 9zx — 4y — 3xz + 5x — 2xy
We put like terms below like terms
7xy + 5yz — 3zx + 4yz + 9zx — 4y — 2xy — 3zx + 5x
5xy + 9yz + 3zx — 4y + 5x
So, required sum = 5xy + 9yz + 3zx — 4y + 5x
Step-by-step explanation:
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