Substrate 5x² - 9x - 10 from 8x² + 10x - 25 = _____?
- 3x² - 19x - 15
- 3x² - 19x + 15
- 3x² + 19x - 15
- None of these
Explanation
First polynomial: 8x² + 10x - 25
Second polynomial: 5x² - 9x - 10
(8x² + 10x - 25) - (5x² - 9x - 10)
= 8x² + 10x - 25 - 5x² + 9x + 10
= 3x² + 19x - 15
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