$\bf (1-2i)^2\implies (1-2i)(1-2i)\implies 1-2i-2i+(2i)^2 \\\\\\ 1-4i+(2^2i^2)\implies \stackrel{\textit{recall }i^2=-1}{1-4i+(4\cdot -1)}\implies 1-4i-4\implies \boxed{-3-4i}$

7 0

4 years ago

Raj reads 7\12 of his book before dinner and another 2\12 of his book after dinner

lina2011 [118]

Answer:

he would have had read 9/12 of the book in total

Step-by-step explanation:

8 0

3 years ago

What is the degree measure of an angle that measures 4.5 radians

Rzqust [24]

Answer:

257.8°

Step-by-step explanation:

rad × 180/π = °

4.5*180=810

810/π=257.8

5 0

3 years ago

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