Question

va rog frumos. Am aflat pe a=2 si b=3 .Cum aflu procentul? ​

Answer 1

$a = \frac{2}{3 + \sqrt{7} } + \sqrt{ {(1 - \sqrt{7} )}^{2} }$

$a = \frac{2(3 - \sqrt{7} )}{(3 + \sqrt{7} )(3 - \sqrt{7} )} + |1 - \sqrt{7} |$

$a = \frac{6 - 2 \sqrt{7} }{ {3}^{2} - {( \sqrt{7}) }^{2} } + \sqrt{7} - 1$

$a = \frac{6 - 2 \sqrt{7} }{9 - 7} + \sqrt{7} - 1$

$a = \frac{6 - 2 \sqrt{7} }{2} + \sqrt{7} - 1$

$a = \frac{6 - 2 \sqrt{7} + 2 \sqrt{7} - 2 }{2}$

$a = \frac{4}{2}$

$a = 2$

$b = {(1 + \sqrt{2} )}^{2} - \frac{4}{ \sqrt{2} }$

$b = {1}^{2} + 2 \times 1 \times \sqrt{2} + {( \sqrt{2}) }^{2} - \frac{4 \sqrt{2} }{2}$

$b = 1 + 2 \sqrt{2} + 2 - 2 \sqrt{2}$

$b = 3$

$\frac{x}{100} \times a = b$

$\frac{x}{100} \times 2 = 3$

$\frac{x}{50} = 3$

$x = 50 \times 3$

$x = 150 \: \%$