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dybincka [34]
3 years ago
6

Solve. x^2+9x+2=0 thanks!

Mathematics
1 answer:
shtirl [24]3 years ago
3 0
Step one:
ALWAYS set equation equal to zero, which in this case has already been done for us.

Step two:
Figure out what formula you need to use in order to solve in this case I'd use the Quadratic formula.

a=1
b=9
c=2

Quadratic formula:
x =  \frac{ - b +  -  \sqrt{(b) ^{2}  - 4(a)(c)} }{2(a)}
Then you would plug in the information.
x = \frac{ - 9+  -  \sqrt{(9) {}^{2} - 4(1)(2) } }{2(1)}
The solve for what is underneath the square root ONLY.
x =  \frac{ - 9 +  -  \sqrt{73} }{2}
Since you cannot solve this any further, your final two answers are...
x =   \frac{ - 9 +  \sqrt{73} }{2}
x =   \frac{ - 9 -  \sqrt{73} }{2}






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8) What is the difference of 2x2 - 4x + 6 and<br> 5x2 + 8x - 2?<br> I will mark brainlist
MariettaO [177]

Answer:

-3x² - 12x + 8

General Formulas and Concepts:

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

  1. Brackets
  2. Parenthesis
  3. Exponents
  4. Multiplication
  5. Division
  6. Addition
  7. Subtraction
  • Left to Right<u> </u>

Distributive Property

<u>Algebra I</u>

  • Terms/Coefficients

Step-by-step explanation:

<u>Step 1: Define</u>

<em>Identify</em>

2x² - 4x + 6 - (5x² + 8x - 2)

<u>Step 2: Simplify</u>

  1. (Parenthesis) Distribute negative:                                                                   2x² - 4x + 6 - 5x² - 8x + 2
  2. Combine like terms:                                                                                         -3x² - 12x + 8
3 0
3 years ago
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