Question

Express 7i7 + 6i6 +3i3 - 2i2 + 1 in the form of a + bi

Answer 1

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$7 {i}^{7} + 6 {i}^{6} + 3 {i}^{3} - 2 {i}^{2} + 1$
$= 7 {i}^{(4 + 3)} + 6 {i}^{(4 + 2)} + 3 {i}^{3} - 2 {i}^{2} + 1$
$= 7 ( - i) + 6( - 1) + 3( - i) - 2( - 1) + 1$
$= - 7i - 6 - 3i + 2 + 1$
$= ( - 10i - 3)$

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Answer 2

Answer:

Step-by-step explanation: