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slamgirl [31]
3 years ago
7

What is the answer to the equation x squared minus 2x equals 15.

Mathematics
1 answer:
anzhelika [568]3 years ago
7 0

Answer:

x = 5 \\ x =  - 3

Step-by-step explanation:

{x}^{2}  - 2x = 15 \\  {x}^{2}  - 2x - 15 = 0 \\  {x}^{2}   + 3x - 5x - 15 = 0 \\ x(x + 3) - 5(x + 3) = 0 \\ (x - 5)(x + 3) = 0 \\ x - 5 = 0 \:  \:  \:  \:  \: or \:  \:  \:  \: x + 3 = 0 \\ x = 5 \:  \:  \:  \: or \:  \:  \:  \:  \:  \: x =  - 3

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Question number 3 pls
marissa [1.9K]
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x=3
x=-4
x=1-2i

4 0
3 years ago
HELP!! Which pair of statements is true
vitfil [10]

Answer:

B

Step-by-step explanation:

If A = {1, 2, 3} and B = {1, 2, 3, 4, 5}

We say that A is a subset of B, since every element of A is also in B.

So

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3 0
3 years ago
Find 41% of 48. Round to the nearest tenth of necessary
pshichka [43]

Answer:

19.7

Step-by-step explanation:

1. Change the percent to a decimal

0.41 of 48

2.Multiply the two numbers together.

0.41 of 48 = 19.68

3. Round to nearest tenth

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8 0
3 years ago
Find the coordinates of the midpoint of line AB given the coordinates: A(-1,<br> 5) B(2,-3)*<br> 
Naily [24]

Answer:

              \bold{M_{AB}\left(\frac12\,,\ 1\right)}

Step-by-step explanation:

The midpoint of AB coordinates are:  M_{AB}\left(x_M\,,\ y_M\right)  where:

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6 0
3 years ago
Write down a number you can square to give an answer bigger than 400 but smaller than 500
Sergeeva-Olga [200]
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20^2 = 400 < 21^2 = 441 < 22^2 = 484 < 500

There are two correct results: 21 and 22.
7 0
3 years ago
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