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[1(1+√2)+3(1-√2)]/(1-√2)(1+√2)
=(1+√2+3-3√2)/(1-2)
=(4-2√2)(-1)=2√2-4
B) Suma de fracciones con común denominador (√3+√2)(√3-√2):
[3(√3-√2)+2(√3+√2)]/(3-2)
=(3√3-3√2+2√3+2√2)/1
=5√3-√2