pls help it's urgent
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3+√7 / 3 - 4√7 = a + b √7
==>( 3 + √7)(3+4√7) / 3² - (4√7)² = a+b√7
==>(9 + 15√7 + 28 )/9 - 112 = a + b√7
==> (37 + 15√7) / -102 = a + b√7
==> 37 + 15√7 = -102a - 102b√7
==> -102 a = 37 , a = - 37 / 102
==> -102b = 15 , b = -15/102
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