x2-4x-21 x2-7x x+3
______ x _______ (divided by) _____
7x x2-14x+49 x+7
I'm pretty sure this has something to do with cross-multiplication and elimination but I am not completely sure. Any help would be appreciated. Thank you!
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x2-4x-21 x2-7x x+3
______ x _______ (divided by) _____
7x x2-14x+49 x+7
I'm pretty sure this has something to do with cross-multiplication and elimination but I am not completely sure. Any help would be appreciated. Thank you!
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I assume that you mean:
$\displaystyle \frac{x^2-4x-21}{7x} \cdot \frac{x^2-7x}{x^2-14x+49} \div \frac{x+3}{x-7}$ .......... Factor the numerator respectively the denominator:
$\displaystyle \frac{(x-7)(x+3)}{7x} \cdot \frac{x(x-7)}{(x-7)^2} \cdot \frac{x-7}{x+3} = \boxed{\frac{x-7}{7}}$