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algol13
3 years ago
6

The difference of the square of a number and 28 is equal to 3 times that number

Mathematics
1 answer:
Pepsi [2]3 years ago
5 0

Answer:

- 4, 7

Step-by-step explanation:

Let the required number be x.

Therefore, according to the given condition:

{x}^{2}  - 28 = 3x \\  {x}^{2}  - 3x - 28 = 0 \\  {x}^{2}  - 7x + 4x - 28 = 0 \\ x(x - 7) + 4(x - 7) = 0 \\ (x - 7)(x + 4) = 0 \\ x - 7 = 0 \: or \: x + 4 = 0 \\ x = 7 \: or \: x =  - 4 \\

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Answer:

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3 years ago
Find the indicated angle measure or arc measure.
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Answer:

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Step-by-step explanation:

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4 years ago
Dolly is measuring the angles of a triangle. He measures the first two angles of a triangle and gets 30 and 100. How could he fi
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8 0
3 years ago
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Drupady [299]

Answer:

4.  988 people

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