proszę o rozwiązanie :
a) 1/2(2(√7+2)(√7+2)=
b)1/2(√18-√5)(√20+√72)=
Z góry dziękuję za pomoc. ;-)
a) 1/2(2√7+4)(√7+2)=1/2(14+4√7+4√7+8)=1/2(22+8√7)=11+4√7
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a) 1/2(2√7+4)(√7+2)=1/2(14+4√7+4√7+8)=1/2(22+8√7)=11+4√7