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calculati:(√7-5)x(√7+5)=,a)√8x√2,b)44√22:22√11,c)5√3-1-4√3+5,d)4√18-2√8-√3(3√12-1),e) (√8+5)(√8-5) varog mult de tot am nevoie urgent dau coroana varog

Răspuns :

(√7-5)x(√7+5)=√7²-5²=7-25=-18
a)√8x√2=√16=4
b)44√22:22√11=2√11x√2/√11=2√2
c)5√3-1-4√3+5=√3+4
d)4√18-2√8-√3(3√12-1)=12√2-4√2-3√36+√3=8√2-18+√3
e) (√8+5)(√8-5)=√8²-5²=8-25=-17

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