mohon bantuannya!! 😊😊

<p>Jawaban: A. &nbsp;97 - 56√3</p><p><br>ingat!</p><p>(a+√b)/( a-√b) = (a+√b)/(a-√b) x (a+√b)/(a+√b)</p><p>√a x √a = a</p><p>a√b + c√b = (a+c)√b</p><p>&nbsp;</p><p>maka</p><p>a^-1 = 1/a&nbsp;</p><p>b = 1/(2-√3 / 2+√3) = ( 2+√3)/(2-√3)</p><p>&nbsp;</p><p>a/b = (2-√3)/(2+√3) / ( 2+√3)/(2-√3)</p><p>= (2-√3)/(2+√3) x (2-√3)/( 2+√3)</p><p>= (4 -2√3 - 2√3 +3)/(4 + 2√3 + 2√3 +3)</p><p>= (7 - 4√3)/(7+ 4√3)&nbsp;</p><p>= (7 - 4√3)/(7 + 4√3) x (7 - 4√3)/(7 - 4√3)</p><p>= (49 - 28√3 - 28√3 +48)/(49 &nbsp;- 48)</p><p>= (97 - 56√3)/1</p><p>= 97 - 56√3</p><p>&nbsp;</p><p>Oleh karena itu, jawaban yang benar adalah A. &nbsp;97 - 56√3</p>