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  • Express each of the complex number in the form a+ib. (4) 3(7+7i)+i(7+7i)

Express each of the complex number in the form a+ib.

Q : 4    3(7+7i)+i(7+7i)

Answers (1)

best_answer

Given problem is 
3(7+7i)+i(7+7i)
Now, we will reduce it into

3(7+7i)+i(7+7i)  = 21+21i+7i+7i^2
                                             = 21+21i+7i+7(-1)                             (\because i^2 = -1)
                                             = 21+21i+7i-7
                                             =14+28i

Therefore, the answer is 14+i28

Posted by

Gautam harsolia

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