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masya89 [10]
3 years ago
14

What are the solutions of 2x2- 6x+5=0?

Mathematics
1 answer:
Scrat [10]3 years ago
5 0

Answer:

$x_{1}=\frac{3}{2}+\frac{i}{2}\\$

$x_{2}=\frac{3}{2}-\frac{i}{2}$

Step-by-step explanation:

It is a Quadratic Equation

2x^2-6x+5=0

Once it cannot be easily factored, you solve it using the quadratic formula or completing the square. I will use the quadratic formula.

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

$x=\frac{-(-6)\pm\sqrt{(-6)^2-4\cdot 2\cdot 5}}{2\cdot 2}$

The discriminant is negative, therefore we got complex solutions.

\Delta= \sqrt{-4}= \sqrt{4i}  =2i

$x=\frac{6\pm 2i}{4}$

$x_{1}=\frac{3+i}{2} $

$x_{2}=\frac{3-i}{2} $

Now, just rewrite the roots in standard complex form

$x_{1}=\frac{3}{2}+\frac{i}{2}\\$

$x_{2}=\frac{3}{2}-\frac{i}{2}$

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nikdorinn [45]

Answer:

<em>In 5 years the product of their ages will be 208</em>

Step-by-step explanation:

The age of two children is 11 and 8 years.

Let's call x the number of years ahead.

We need to find when the product of their future ages is 208. The 11 years old child will be 11+x years old and the other child will be 8+x years, thus:

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Operating:

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Simplifying:

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3 years ago
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3 years ago
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Likurg_2 [28]

Answer:

50 is correct

Step-by-step explanation:

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Step-by-step explanation:

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Answer:

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