Rationalize the denominator and simplify :5+2√3÷7+4√3
Answers
Answered by
3
here is your answer as it may help you
Attachments:
![](https://hi-static.z-dn.net/files/d2a/47a2a649a90deabc6fe0aa0acfa6672e.jpg)
Answered by
12
Hi...☺
Here is your answer...✌
![\frac{5 + 2 \sqrt{3} }{7 + 4 \sqrt{3} } \\ \frac{5 + 2 \sqrt{3} }{7 + 4 \sqrt{3} } \\](https://tex.z-dn.net/?f=+%5Cfrac%7B5+%2B+2+%5Csqrt%7B3%7D+%7D%7B7+%2B+4+%5Csqrt%7B3%7D+%7D++%5C%5C+)
On rationalising the denominator,
We get
![\frac{5 + 2 \sqrt{3} }{7 + 4 \sqrt{3} } = \frac{5 + 2 \sqrt{3} }{7 + 4 \sqrt{3} } \times \frac{7 - 4 \sqrt{3} }{7 - 4 \sqrt{3} } \\ \\ = \frac{35 - 20 \sqrt{3} + 14 \sqrt{3} -8 \times 3 }{ {7}^{2} - {(4 \sqrt{3}) }^{2} } \\ \\ = \frac{35 - 6 \sqrt{3} - 24}{49 - 48} \\ \\ = \frac{11 - 6 \sqrt{3} }{1} \\ \\ = 11 - 6 \sqrt{3} \frac{5 + 2 \sqrt{3} }{7 + 4 \sqrt{3} } = \frac{5 + 2 \sqrt{3} }{7 + 4 \sqrt{3} } \times \frac{7 - 4 \sqrt{3} }{7 - 4 \sqrt{3} } \\ \\ = \frac{35 - 20 \sqrt{3} + 14 \sqrt{3} -8 \times 3 }{ {7}^{2} - {(4 \sqrt{3}) }^{2} } \\ \\ = \frac{35 - 6 \sqrt{3} - 24}{49 - 48} \\ \\ = \frac{11 - 6 \sqrt{3} }{1} \\ \\ = 11 - 6 \sqrt{3}](https://tex.z-dn.net/?f=+%5Cfrac%7B5+%2B+2+%5Csqrt%7B3%7D+%7D%7B7+%2B+4+%5Csqrt%7B3%7D+%7D++%3D++%5Cfrac%7B5+%2B+2+%5Csqrt%7B3%7D+%7D%7B7+%2B+4+%5Csqrt%7B3%7D+%7D++%5Ctimes++%5Cfrac%7B7+-+4+%5Csqrt%7B3%7D+%7D%7B7+-+4+%5Csqrt%7B3%7D+%7D++%5C%5C++%5C%5C++%3D++%5Cfrac%7B35+-+20+%5Csqrt%7B3%7D++%2B+14+%5Csqrt%7B3%7D++-8+%5Ctimes+3+%7D%7B+%7B7%7D%5E%7B2%7D+-++%7B%284+%5Csqrt%7B3%7D%29+%7D%5E%7B2%7D++%7D++%5C%5C+++%5C%5C+%3D++%5Cfrac%7B35+-+6+%5Csqrt%7B3%7D++-+24%7D%7B49+-+48%7D++%5C%5C++%5C%5C++%3D++%5Cfrac%7B11+-+6+%5Csqrt%7B3%7D+%7D%7B1%7D++%5C%5C++%5C%5C++%3D+11+-+6+%5Csqrt%7B3%7D+)
Here is your answer...✌
On rationalising the denominator,
We get
Similar questions