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3 years ago

Please help Which expressions are equivalent to the given complex number?

Mathematics

1 answer:

Brut [27]3 years ago

7 0

(9 + 4i ) + ( 36 - 2i) is the equivalent complex number

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HEY :} can you help me..thanks 2% of 350 285% of 200 24 red marbles is 40% of ___ marbels 12 is __% of 200

Luba_88 [7]

2% of 350 = 7

285% of 200 = 570

24 red marbles is 40% of 60 marbles

12 is 6% of 200

Hope this helps!!!
~Kiwi

4 0

3 years ago

Find all the zeros of the equation x^4-6x^2-7x-6=0

rusak2 [61]

Answer:

The zeros are

$x=-2,\:x=3,\:x=-\frac{1}{2}+i\frac{\sqrt{3}}{2},\:x=-\frac{1}{2}-i\frac{\sqrt{3}}{2}$

Step-by-step explanation:

We have been given the equation x^4-6x^2-7x-6=0

Use rational root theorem, we have

$a_0=6,\:\quad a_n=1$

$\mathrm{The\:dividers\:of\:}a_0:\quad 1,\:2,\:3,\:6,\:\quad \mathrm{The\:dividers\:of\:}a_n:\quad 1$

$\mathrm{Therefore,\:check\:the\:following\:rational\:numbers:\quad }\pm \frac{1,\:2,\:3,\:6}{1}$

$-\frac{2}{1}\mathrm{\:is\:a\:root\:of\:the\:expression,\:so\:factor\:out\:}x+2$

$=\left(x+2\right)\frac{x^4-6x^2-7x-6}{x+2}\\$

$=x^3-2x^2-2x-3$

Again factor using the rational root test, we get

$=\left(x+2\right)\left(x-3\right)\left(x^2+x+1\right)$

Using the zero product rule, we have

$x+2=0:\quad x=-2\\x-3=0:\quad x=3\\x^2+x+1=0\\\\x_{1,\:2}=\frac{-1\pm \sqrt{1^2-4\cdot \:1\cdot \:1}}{2\cdot \:1}\\\\=-\frac{1}{2}+i\frac{\sqrt{3}}{2},\:x=-\frac{1}{2}-i\frac{\sqrt{3}}{2}$

Therefore, the zeros are

$x=-2,\:x=3,\:x=-\frac{1}{2}+i\frac{\sqrt{3}}{2},\:x=-\frac{1}{2}-i\frac{\sqrt{3}}{2}$

4 0

3 years ago

Read 2 more answers

Martin uses his power saw every 15 seconds.How many times did he use it in one hour ?

Alina [70]

Answer:

60÷15 =4

Therefore Martin uses his power saw 4 times in one hour 

7 0

3 years ago

Read 2 more answers

What is 1/4 times 2/4

boyakko [2]

1/4= 0.25
2/4= 1/2 = 0.5
0.25 x 0.5 = 0.125
0.125 = 1/8

8 0

3 years ago

Simplify 4x^2 / 3 X 6/ 8x

Leokris [45]

Answer:

Step-by-step explanation:

The answer to

$\frac{4 {x}^{2} }{3} \times \frac{6}{8x}$

= x

3 0

2 years ago

Read 2 more answers