3 years ago

NEED ANSWERS NOW!! (Reward) brainlest and pointsss

Mathematics

2 answers:

klasskru [66]3 years ago

8 0

Answer:

I don't know I don't know I don't know

Liula [17]3 years ago

3 0

It isssss Bbbbbbbbbbb

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4 years ago

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Given that <img src="https://tex.z-dn.net/?f=z%3Dx%2Biy" id="TexFormula1" title="z=x+iy" alt="z=x+iy" align="absmiddle" class="l

Mnenie [13.5K]

Answer:

$z= 5-2i$

Step-by-step explanation:

Start replacing!

$(x+iy) + 4i (x-iy) = -3+18i \\ x+iy +4ix -4i^2 y = -3 + 18i \\\\x + i (4x+y) +4y = -3 + 18i\\x+4y + (4x+y) i = -3 + 18i$

Now two complex numbers are equal if both the real and imaginary parts are equal, which gives you the system of equation $\left \{x+4y=-3} \atop {4x+y=18} \right.$

Pick any method to solve it and you'll get $x=5, y= -2$

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3 years ago

What is -3/11 as a decimal

Marianna [84]

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