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Question

Mathematics Question on Complex Numbers and Quadratic Equations

Express the given complex number in the form a+ib:3(7+i7)+i(7+i7)a + ib: 3(7 + i7) + i(7 + i7)

Answer

3(7 + i7) + i(7 + i7)

=21+21i +7i+7i2

=21+28i-7

=14+28i (Ans.)