What is (5x-7) when x = -1?

-2

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-12

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Solution

The correct option is C
-12

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Similar questions

x - \frac{1}{x} = \sqrt{5} x^{7} - \frac{1}{x^{7}} =

(1 - 5 x)^{7} + (1 + 5 x)^{7}

\frac{2}{5} x [5 x \frac{7}{6} + \frac{1}{3} x (3 x \frac{4}{11})]

x^{2} - 5 x - x^{5} - \frac{5 x^{7}}{6} + 11

x^{4}

- 5 x^{7} + \frac{3}{7} x^{4} - 3 x^{3} + 7 x^{2} - 1

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