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Semenov [28]
3 years ago
12

Find the value of the expression :

Mathematics
1 answer:
kykrilka [37]3 years ago
8 0

Answer: x² + 2xy + y² = 9

x² + 2xy + y² = (x + y)²

with x = 2 + 3i and y = \frac{3+i}{i}, we have:

(x + y)^{2}=(2+3i+\frac{3+i}{i})^{2}\\\\=(\frac{2i+3i^{2}+3+i }{i})^{2}\\\\=(\frac{3i-3+3}{i})^{2}  \\\\=(\frac{3i}{i})^{2}\\\\=3^{2}=9

Step-by-step explanation:

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What is 7 7//8 + 2 1/4=
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Answer:

14.875

Step-by-step explanation:

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5 0
4 years ago
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How many of the 1000 smallest positive integers are congruent to 1 modulo 9?
Serjik [45]
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Now let us check our work.

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4 years ago
Find the area of each round your answer to the nearest tenth
daser333 [38]

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6 0
3 years ago
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Find the equation of a line that passes through the points (1,-5) and (3,-6).
sdas [7]

Answer:

y = - \frac{1}{2} x - \frac{9}{2}

Step-by-step explanation:

The equation of a line in slope- intercept form is

y = mx + c ( m is the slope and c the y- intercept )

Calculate m using the slope formula

m = \frac{y_{2}-y_{1}  }{x_{2}-x_{1}  }

with (x₁, y₁ ) = (1, - 5) and (x₂, y₂ ) = (3, - 6)

m = \frac{-6+5}{3=2} = - \frac{1}{2} , then

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To find c substitute either of the 2 points into the partial equation

Using (1, - 5 ) , then

- 5 = - \frac{1}{2} + c ⇒ c = - 5 + \frac{1}{2} = - \frac{9}{2}

y = - \frac{1}{2} x - \frac{9}{2} ← equation of line

7 0
3 years ago
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