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Dafna1 [17]
3 years ago
8

What number must you add to complete the square x^2+2x=9

Mathematics
2 answers:
MAVERICK [17]3 years ago
5 0

Answer:

+ 1

Step-by-step explanation:

Given

x² + 2x = 9

To complete the square

add ( half the coefficient of the x- term )² to both sides

x² + 2(1)x + 1² = 9 + 1²

(x + 1)² = 10

yaroslaw [1]3 years ago
3 0

Answer:x =(-2-√-32)/-2=1+2i√ 2 = 1.0000-2.8284i

x =(-2+√-32)/-2=1-2i√ 2 = 1.0000+2.8284

Step-by-step explanation:

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Circumference of a circle given the radius or diameter? explain why or why not
jek_recluse [69]

Answer: The Radius is the distance from the center outwards. The Diameter goes straight across the circle, through the center. The Circumference is the distance once around the circle.

The formula for calculating the radius is different from calculating the diameter

Find radius

r= diameter/ 2

Radius is half of a diameter

While diameter is

d=2r

Step-by-step explanation:

6 0
3 years ago
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What is the distance between 12 7 and 3 7 !
Vinil7 [7]

Answer:

The answer is 15 units is the answer boom

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
Consider 8x2 - 48x = -104.
ki77a [65]

Answer:

3+ 2\mathbf{i}

3- 2\mathbf{i}

Step-by-step explanation:

<u>Quadratic Equation Solving</u>

We have the equation:

8x^2-48x=-104

Divide by 8:

x^2-6x=-13

Now complete the squares so the left side is a perfect square of a binomial:

x^2-6x+9=-13+9=-4

Factoring the perfect square:

(x-3)^2=-4

Taking the square root:

x-3=\sqrt{-4}

The square root of a negative number is an imaginary number:

x-3=\pm 2\mathbf{i}

Solving for x:

x=3\pm 2\mathbf{i}

The solutions are:

3+ 2\mathbf{i}

3- 2\mathbf{i}

7 0
3 years ago
Pls tell me the answer with an explanation how you got it!
Flura [38]

Answer:

25 degrees

Step-by-step explanation:

40 + 50 = 90

2 x 25 = 5

8 0
3 years ago
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