Mathematics: Select all of the values that are solutions of x2 + 20 = 12x. x = -10 x = -2 x = 2 x = 10

Select all of the values that are solutions of x2

Ответ:

lexis1446

24.05.2020

Mathematics

2, and 10

Step-by-step explanation:

Let's work through each one.

First, plug -10 into the equation:

-10² + 20 = 12 x -10?

-10² = 100

100 + 20 = 120

12 x -10 = -120

120 = -120? False!

But, using these same calculations, we can see that 10 is a correct answer.

Because everything's the same up to 12 x 10 = 120.

120 = 120

Same with 2 and -2

-2 does not work, but 2 does.

2² + 20 = 12 x 2?

4 + 20 = 24?

24 = 24? True!

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Ответ:

svarner2001

24.05.2020

Mathematics

2 and 10

Step-by-step explanation:

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Ответ:

1031kylepoe03

18.05.2020

Mathematics

$8\frac{1}{2} x - 6\frac{1}{2}$

Step-by-step explanation:

$Simplification (show.all.of.the.following)\\(3x-4\frac{1}{2})-(-5\frac{1}{2}x-2)\\3x-4\frac{1}{2}+5\frac{1}{2}x-2\\(3x+5\frac{1}{2}x)-(4\frac{1}{2}+2)\\(8\frac{1}{2})-(6\frac{1}{2})$

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Select all of the values that are solutions of x2 + 20 = 12x. x = -10 x = -2 x = 2 x = 10

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