What are the factors of x² - 9x + 20?
- (x − 5)(x − 4)
- (x − 9)(x − 2)
- (x − 10)(x + 2)
- None of these
Explanation
The numbers 5 and 4 multiply to 20 and add up to 9.
Hence, x² - 9x + 20 = (x - 5) (x - 4)
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- 10x = - 3
- 2x = - 27
- 2x = 27
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- 1, 4, -21
- 1, 4, 21
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اس سوال کو وضاحت کے ساتھ پڑھیں
- 2/x + 12/(x +5)
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- 4/x + 16/(x +5)
- None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
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