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aksik [14]
3 years ago
15

Does someone knows how to solve this. Step by step? Completing the Square:x^2-6x=15​

Mathematics
1 answer:
bixtya [17]3 years ago
3 0

Answer:

x_1=3+2\sqrt{6}

x_2=3-2\sqrt{6}

Step-by-step explanation

\rule{100mm}{0.5mm}

                           x^2-6x=15

x^2-6x+\left(\dfrac{6}{2}\right)^2-\left(\dfrac{6}{2}\right)^2=15

                   x^2-6x+3^2=15+3^2

                     x^2-6x+9=15+9

                          (x-3)^2=24

                       \sqrt{(x-3)^2} =\sqrt{24}

                              x-3=\pm2\sqrt{6}

                                  \red{\boxed{x_1=3+2\sqrt{6}}}

                                  \red{\boxed{x_2=3-2\sqrt{6}}}                                

\rule {100mm}{0.5mm}

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Step-by-step explanation:

In this context, D means "domain" and R means "range." The domain of a function is the list of input values for which the function is defined. For ordered pairs, it is the first number of the pair. For an x-y table, it is the list of x-values. For a graph, it is the possible values of x.

A relation is a <em>function</em> only if there are no repeated values in the domain (2 or more outputs for the same input.)

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31. D: {8, 4, 0, -4}

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32. D: {-1, 2, 7}

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<h3>How to determine the inverse of the equation?</h3>

The equation is given as:

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