Question

1) efectuati : 2 sin 60° +2tg45°-3ctg60°. 2)24% din numarul 625 este. 3) calculeaA media aritmetica a nr 14,21,49,30.4) (X-4)(x+4)

Answer 1

E=2·√3/2+2·1-3·√3/3=√3+2-√3=2
24/100·625=... si faci simplificarile de rigoare
(14+21+49+30,4)/4=...
(x-4)(x+4)=x²-4²=x²-16