Question

Write the expression in the form a+bi. √ -4 - √144

Answer 1

Answer:

-12 + 2i

Step-by-step explanation:

$\sqrt{ - 4} - \sqrt{144} \\ \\ = \sqrt{ - 1 \times 4} - \sqrt{144} \\ \\ = \sqrt{ - 1} \times \sqrt{4} - \sqrt{144} \\ \\ = i \times 2 - 12 \\ \\ = - 12 + 2i \\ \implies \: a + bi$