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Natalija [7]
3 years ago
14

What is the conjugate of 3 + 6i? A -3 - 61 B 3 - 6i C 3 + 6i D 9i

Mathematics
1 answer:
zhenek [66]3 years ago
7 0

Answer:

C.3-6

Step-by-step explanation:

Every complex number has a complex conjugate.

Examples is a+bi the conjugate is a-bi,if your adding the two conjugate its going to be 2a and if your subtracting the result is 2bi.And if multiplied it is seen as complex number which are a²+b²

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a map has a scale of 1.5 inches = 9 miles. On the map, two towns are 4 inches apart. What is the distance, in miles between the
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36

Step-by-step explanation:

i multpliy 9x4=36

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What percent is 2.5 of 40
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1

Step-by-step explanation:

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Solve for s.<br> S + 3s - 4 = 16<br> S =<br> Submit
const2013 [10]
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3 years ago
Consider the equation x2+4x+9=0 in standard form. Which equation shows the coefficients a, b, and c correctly substituted into t
Afina-wow [57]

Answer:

<h2>x = -2+i√5 and  -2i-√5</h2>

Step-by-step explanation:

The general form of a quadratic equation is ax²+bx+c = 0

Given the quadratic equation x²+4x+9=0 in its standard form, on comparing with the general equation we can get the value of the constant a, b and c as shown;

ax² = x²

a = 1

bx = 4x

b = 4

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The quadratic formula is given as x = -b±√(b²-4ac)/2a

Substituting the constant;

x = -4±√(4²-4(1)(9))/2(1)

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x = -4±√-20/2

x = -4±(√-1*√20)/2

Note that √-1 = i

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x = (-4±i2√5)/2

x = -4/2±i2√5/2

x = -2±i√5

The solution to the quadratic equation are  -2+i√5 and  -2i-√5

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