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klio [65]
3 years ago
13

I need help with 2b.

Mathematics
1 answer:
kodGreya [7K]3 years ago
7 0

Answer:

The answer to your question

a) Values excluded = -2, 0

b) solutions = -2/3, 2

Step-by-step explanation:

Equation

                        \frac{4x}{2x + 4} = \frac{x+ 2}{2x}

a) x is restricted when the denominators equal zero, so let's get them.

                 2x + 4 = 0                           2x =  0

                 2x = - 4                                  x = 0 / 2

                 x = -4 / 2                               x = 0

                 x = -2

x must be different to -2, 0

b)                   \frac{4x}{2x + 4} = \frac{x+ 2}{2x}

                      \frac{2x}{x + 2} = \frac{x + 2}{2x}

                      4x² = (x + 2)²

                      4x² = x² + 4x + 4

                     4x² - x² - 4x - 4 = 0

                      3x² - 4x - 4 = 0

                      3x² - 6x + 2x - 4 = 0

                     3x(x - 2) + 2(x - 2) = 0

                     (x - 2)(3x + 2) = 0

                      x₁ - 2 = 0                  3x₂ + 2 = 0

                     x₁ = 2                         x₂ = -2/3

                             

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The possible dimensions of a rectangular court obtained from a similar question posted online are;

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