Question

Simplify the expression to a + bi form: (12 - i)^2

Answer 1

Answer:

We know that, i = √-1 => i² = -1

$→{(12 - i)}^{2} \\ = {(12)}^{2} + {(i)}^{2} - 24i \\ = 144 - 1 - 24i \\ = \boxed{143 - 24i}✓$

• 143 - 24i is the right answer.

Answer 2

Answer:

143-24i

Step-by-step explanation:

(12-i)^2

(12-i)(12-i)

144-12i-12i+i^2 where i^2=-1

144-24i+(-1)

144-1-24i

143-24i

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