For i^2 = -1, if 3i (2 + 5i) = x + 6i, then x =?
- 5i
- 15i
- -15
- None of these
Explanation
The calculation confirms that:
3i(2 + 5i) = 6i + 15i^2
= 6i - 15
Comparing this to x + 6i:
x = -15
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اس سوال کو وضاحت کے ساتھ پڑھیں
- (t² + 4)(t - 2)(t - 2)
- (t² - 4)(t² - 4)
- (t² + 4)(t + 2)(t - 2)
- None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
- +4
- -4
- +16
- None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
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