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

7 0

4 years ago

If 8 sugar cost 260 how much sugar can be brought for 877.500

bija089 [108]

Answer: 27 kg of sugar can be bought for Rs. 877.50.

Step-by-step explanation:

8 0

4 years ago

Read 2 more answers

I’m just not getting it! I need step by step.

Alexus [3.1K]

Answer:

$7x + 10 + x + 20 + 2x \\ 7x + x + 2x + 10 + 20 \\ 10 x + 30 \\ x = \frac{30 }{10} \\ x = 3 \\ (7x + 10) = 7 \times 3 + 10 = 31 \\ (x + 20) = 3 + 20 = 23 \\ (2 \times 3) = 6$

Step-by-step explanation:

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8 0

3 years ago