Question

Calculati :a)10√1,44+√48-√12-6supra √3-5√0,16 b)1 supra √7-2 - 1supra √7+2

Answer 1

a)  (10·1,2 + 4√3 - 2√3 - 6)/ (√3 - 5·0,4) = (6 +2√3)/(√3 - 2) = 2(√3+3)/(√3 - 2) = 2(√3+3)(√3+2)/(3-4) = - 2(3 +3√3 + 2√3 +6) = -2(9 + 5√3)
b)  1/(√7 - 2) - 1/(√7+2) = (√7 + 2 - √7 +2)/3 = 4/3