3 years ago

5. 4i(-2 - 4i)

Mathematics

1 answer:

Wewaii [24]3 years ago

4 0

Answer:

$4i( - 2 - 4i) = - 8i + 16 \\ \\ 5i.i.( - 2i) = 10i \\ \\ (- 5 - i)(1 + i) = -5-5i-i+1\\=-4-6i$

You might be interested in

A stock market analyst observes the following for the price of two stocks that he owns, one of which is increasing at an exponen

Alex

In 50 years stock A realises 15*50 + 130 = $880

in 50 yeras stock B gives 50(1.09)^50 = $2676.87

2676.87 - 880 = $ 1796.87 / share

Its C

5 0

4 years ago

(a) If cos² (34°) - sin² (34°) = cos(A°),then<br> A =<br> degree’s

krok68 [10]

$~~~~~~~\cos^2 \left(34^{\circ}\right) - \sin^2 \left( 34^{\circ} \right)=\cos A\\\\\implies \cos \left( 2 \cdot 34^{\circ} \right) = \cos A~~~~~~~~~~~~~;[\cos 2x = \cos^2 x -\sin^2 x]\\\\\implies \cos \left(68^{\circ}\right) = \cos A\\\\\implies A = 68^{\circ}$

3 0

2 years ago

Anais bought 4 1/2 yards of ribbon. She had 3 feet 8 inches of ribbon left after trimming some curtains. How many inches of ribb

lubasha [3.4K]

Answer:

She used 118 inches of ribbon.

Step-by-step explanation:

Convert the yards to inches.

4.5 yards= 162 inches.

Convert feet to inches.

3 feet= 36 inches.

She has 44 inches of ribbon left.

Now you subtract.

162-44= 118

4 0

3 years ago

You are considering two investment opportunities. For investment A there is a 25% chance that you lose $20,000, a 50% chance tha

Tomtit [17]

a 15000 !!! i just took the question

b 21000

5 0

4 years ago

Read 2 more answers

Simplify:3^5×10^5×125×t^-6/5^-7×6^-5×t^-2 <br> Please do answer

tekilochka [14]

Answer: 30517578125/t^8

6 0

3 years ago