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kow [346]
3 years ago
10

8 = 3(3x + 8) − x whats x and explenation :)

Mathematics
1 answer:
MissTica3 years ago
5 0
8=3(3x+8)-x
8=9x+24-x
-16=8x
x= -2
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raketka [301]

Answer:

3x - y = 8

y = 3x - 8

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Answer:

x= \frac{-3 - \sqrt{145} }{4} \ \ or\ \  x= \frac{-3 + \sqrt{145} }{4}

Step-by-step explanation:

2x² + 3x + 3 = 20​

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<u>Using the Quadratic Formula to solve a Quadratic Equation</u> :

x= \frac{-b \pm \sqrt{b^{2}-4ac} }{2a}

In the equation 2x² + 3x - 17 = 0

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Then

b² - 4ac = 3² - 4×2×(-17)

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Then

b² - 4ac > 0

Then

x= \frac{-3 \pm \sqrt{145} }{2 \times 2}

Then

x= \frac{-3 \pm \sqrt{145} }{4}

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