Please tell me the answer of 14,15,16 sums
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Step-by-step explanation:
1. (3y² + 5y - 4) - (8y - y² - 4)
= 3y² + 5y - 4 - 8y + y² + 4
= 4y² - 3y
2. 5mn - 7n, 3n - 4m + 2, 2m - 3mn - 5n
= 5mn - 7n + 3n - 4m + 2 + 2m - 3mn - 5n
= 2mn - 9n - 2m + 2
3. x² + 10x - 5 from 15x - 10
= 15x - 10 - (x² + 10x - 5)
= 15x - 10 - x² - 10x + 5
= x² + 10x - 5
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