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balu736 [363]
3 years ago
7

Im having a hard time on this question and I hope you can help.

Mathematics
2 answers:
Irina-Kira [14]3 years ago
5 0

Answer:

your answer would be x≠ 0


Masja [62]3 years ago
3 0

The answer would be x ≠ 0

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

First start with the left side, doing distributive property

So... -2(x) = -2x and -2(5) = -10 Therefore on the left side you now have -2x -10

Next do the same on the right side

-2(x) = - 2x and -2(-2) = 4 so you have -2x + 4 + 5 and you add 4 and 5, leaving you with -2x + 9

Now that you have simplified both sides the problem now looks like this:

-2x - 10 = -2x + 9

Because you have equal terms on both sides (-2) those cancel out so you have -10 = 9

Just from looking at this we know that the statement is false because -1o does not equal 9

*The symbol, "≠" means not equal to"

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What is the roots of f(x)=-x^2-6x-14
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Answer:

x=-3\pm i \sqrt{5}

General Formulas and Concepts:

<u>Pre-Algebra</u>

  • Order of Operations: BPEMDAS
  • Equality Properties

<u>Algebra I</u>

  • Standard Form: ax² + bx + c = 0
  • Quadratic Formula: x=\frac{-b\pm\sqrt{b^2-4ac} }{2a}

<u>Algebra II</u>

  • Imaginary roots: √-1 = i

Step-by-step explanation:

<u>Step 1: Define function</u>

f(x) = -x² - 6x - 14

<u>Step 2: Set up</u>

  1. Set equation equal to 0:                    -x² - 6x - 14 = 0
  2. Factor out -1:                                       -(x² + 6x + 14) = 0
  3. Divide both sides by -1:                      x² + 6x + 14 = 0

<u>Step 3: Define variables</u>

a = 1

b = 6

c = 14

<u>Step 4: Find roots</u>

  1. Substitute:                              x=\frac{-6\pm\sqrt{6^2-4(1)(14)} }{2(1)}
  2. Exponents:                             x=\frac{-6\pm\sqrt{36-4(1)(14)} }{2(1)}
  3. Multiply:                                  x=\frac{-6\pm\sqrt{36-56} }{2}
  4. Subtract:                                 x=\frac{-6\pm\sqrt{-20} }{2}
  5. Factor:                                    x=\frac{-6\pm\sqrt{-1} \sqrt{20} }{2}
  6. Simplify:                                  x=\frac{-6\pm2i \sqrt{5} }{2}
  7. Factor:                                    x=\frac{2(-3\pm i \sqrt{5} )}{2}
  8. Divide:                                    x=-3\pm i \sqrt{5}
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