Question

Первое задание. Помогите аж

Answer 1

а)(√x + 2√3) / (x - 12) = (√x + √12) / (√x + 12)(√x - 12) = 1 / (√x - 12)
б)(√7a + √14b) / (a + 2√2ab + 2b) = √7(a + 2b) / (√a + √2b)^2 = √7 / (√a + 2b)

Answer 2

$frac{ sqrt{x} +2 sqrt{3} }{x-12} = frac{ sqrt{x} + sqrt{12} }{x-12} = frac{ sqrt{x} + sqrt{12} }{(sqrt{x} - sqrt{12})(sqrt{x} + sqrt{12})} = frac{1}{sqrt{x} - sqrt{12} }$
$frac{ sqrt{7a}- sqrt{14b} }{a+2 sqrt{2ab} +2b} = frac{ sqrt{7}* sqrt{a} - sqrt{7}*sqrt{2b} }{a+ sqrt{8ab} +2b} = frac{ sqrt{7a} ( sqrt{a} - sqrt{2b)} }{( sqrt{a}+ sqrt{2b} )^{2} } = frac{ sqrt{7a} }{sqrt{a}+ sqrt{2b} } =$