Question

please answer the 4th part

Answer 1

Multiply the denominator and the neumarator , with 7 - 4root3

We get,

$\frac{5 + 2 \sqrt{ 3} }{7 + 4 \sqrt{3} } \times \frac{7 - 4 \sqrt{3} }{7 - 4 \sqrt{3} }$
We get,

$11 - 6 \sqrt{3}$
This is in the form of

$a+b \sqrt{3}$
a = 11
b = -6

Hope my answer helps!

Answer 2

Hello dear I am Tanwi and your answer is in up in photo



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Bye dear