If the sum of two numbers is 13 and their difference is 23, what is their product?
- -90
- 0
- -100
- None of these
Explanation
Let numbers be x and y.
1. Given:
x + y = 13
x - y = 23
2. Add both equations:
2x = 36
x = 18
3. Put x = 18 in x + y = 13:
18 + y = 13
y = -5
4. Product:
xy = 18 × (-5) = -90
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- None of these
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- 10x = - 3
- 2x = - 27
- 2x = 27
- None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
- 1, 4, -21
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اس سوال کو وضاحت کے ساتھ پڑھیں
- 2/x + 12/(x +5)
- 3/x + 22/(x +5)
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- None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
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