Question

-Ajutor !!!
-Calculați folosind formula de calcul prescurtat :
(2+2√2)²-(2√2-3)²
(2√3-1)²-(2√2-1)(2√2+1)​

Answer 1

[2²+2•2•2√2+(2√2)²]-[(2√2)²+2•2√2•3+3²]=

(4+8√2+4•2)-(4•2+12√2+9)=

4+8√2+8-8-12√2-9=

4+8-8-9+8√2+12√2=

-5+20√2

[(2√3)²-2•2√3•1+1²]-(2√2•2√2+2√2•1-1•2√2-1)=

(4•3-4√3+1)-(4•2+2√2-2√2-1)=

13-4√3-7=

13-7-4√3=

6-4√3

Answer 2

sper sa înțelegi ce am scris

succes in continuare