3 years ago

Expand the following: 1/5 (10x-25)

Mathematics

1 answer:

mario62 [17]3 years ago

3 0

<span>This must be your answer:
Expanded: 1/5 x 10x + 1/5 x -25 </span>

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Multiply numerator and denominator by the denominator's conjugate:

$\dfrac{3\pm\sqrt5}{15\pm5\sqrt5}\cdot\dfrac{15\mp5\sqrt5}{15\mp5\sqrt5}=\dfrac{45\pm15\sqrt5\mp15\sqrt5-25}{15^2-(5\sqrt5)^2}=\dfrac{20}{100}=\dfrac15$

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