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Novay_Z [31]
3 years ago
7

Solve: negative 1 over 2 x + 2 = −x + 7 (5 points)

Mathematics
1 answer:
anzhelika [568]3 years ago
6 0

Answer:

x = 10

Step-by-step explanation:

-\dfrac{1}{2}x+2=-x+7\qquad\text{Given}\\\\\dfrac{1}{2}x=5\qquad\text{add x-2}\\\\x=10\qquad\text{multiply by 2}

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Which is one of the solutions to the equation 2x^2 - x - 4 = 0
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Answer:

x_{1}=\frac{1+\sqrt{33} }{4}\\x_{2}=\frac{1-\sqrt{33} }{4}

Step-by-step explanation:

Using quadratic formula

x=\frac{-b+-\sqrt{b^{2}-4*a*c} }{2*a}

we will have two solutions.

2x^2 - x - 4 = 0

So, a=2   b=-1  c=-4, we have:

x_{1}=\frac{+1+\sqrt{-1^{2}-4*2*-4} }{2*2}\\\\x_{2}=\frac{+1-\sqrt{-1^{2}-4*2*-4} }{2*2}

Finally, we have two solutions:

x_{1}=\frac{1+\sqrt{33} }{4}\\\\x_{2}=\frac{1-\sqrt{33} }{4}

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3 years ago
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3/5 = (3×2)/(5×2)

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