Błagam was o pomoc
podane wyrazenia doprowadz do najprostszej postaci.
ta dwójka duza za nawiasami bez zadnego znaku to do ptęgi drugiej
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1)(√6-√7)(√6+√7)-(3√7+√6)^2-(√7-√6)^2= [(√6)^2 - (√7)^2] - (9*7 + 6) - (7-2*√7*√6+6)=
=-1-69-7-2√42+6= -71-2√42
2) (√2+√5)^2 + (4√2-2√5)^2+8√10= (2+5+2*√2*√5)+ 32 - 20 + 8√10=7+2√10+12+8√10=
=19+10√10