Simplify. Write your answers in the form of a+bi, where a and b are real numbers.
-$$( 7 - 3 \mathrm { i } ) ^ { 2 }$$
A) $58 - 42 \mathrm { i }$
B) $40 - 42 \mathrm { i }$
C) $40 + 42 i$
D) $58 + 42 \mathrm { i }$

Question

Quizplus · Accepted Answer

To simplify $(7 - 3i)^2$, we first expand the expression: $(7 - 3i)(7 - 3i) = 49 - 21i - 21i + 9i^2$. Since $i^2 = -1$, we get $49 - 42i - 9 = 40 - 42i$.

Simplify Write Your Answers in the Form of A+bi, Where (7−3i)2( 7 - 3 \mathrm { i } ) ^ { 2 }(7−3i)2

Simplify Write Your Answers in the Form of A+bi, Where $( 7 - 3 \mathrm { i } ) ^ { 2 }$