Question

Aduceti expresia la forma cea mai simpla:$\sqrt{5} -x) ^{2} +(x+ \sqrt{5} )^{2} -4 \sqrt{5} =?$

Answer 1

(√5-x)²+(x+√5)²-4√5=
5-2√5x+x²+x²+2√5+5-4√5=
10+2x²-4√5=
2x²+10-4√5
sucees