Question

Efectuati: a) (x+5) totul la puterea a 2. b) (x-7)totul la puterea a 2. c) (5x+radical din2)totul la puterea a 2 = d)(3x-2)totul la puterea a 2. e)(2x+5)(3x-5)= f) (radical3- 2)totul la puterea a 2. g) (radical5_1)totul la puterea a 2.- h) (radical13-radical7)(radical13+radical7)= Ajutati ma va rog dau coroanaaaaaaaaa

Answer 1

Răspuns:

a) $x^{2}$ +10x+25

b) $x^{2}$ -14x+49

c) 25$x^{2}$ +10x$\sqrt{2}$ +2    ( $\sqrt{2}$ * $\sqrt{2}$=2)

d)  6$x^{2}$ -10x+15x-25= 6$x^{2}$ +5x-25

f)  3-4$\sqrt{3}$ +4= 7+4$\sqrt{3}$

g) 5-2$\sqrt{5}$ +1= 6-2$\sqrt{5}$

h) 13-$\sqrt{13*7}$ +$\sqrt{91}$- 7= 4 - $\sqrt{91}$ +$\sqrt{91}$= 4