Question

Calculati:

a) 3 radical din 3 - radical din 27=

b) radical din 5 × (radical din 2 + radical din 5)=

c) (x + 5 ) la puterea 2=

d)(2x - 3) la puterea a 2 =

e) (4x - 5) (4x + 5)=

f) (3x + 5) - (2x + 7y - 2) + (x + 7y)=

g) 18 x la puterea 5 ÷ (-3x la puterea a 3) + 2x ( x-1) - (-24 x la puterea a 4) ÷ (-2x la puterea 2) =

Va rog am mare nevoie de ajutor.
Multumesc.​

Answer 1

a) 3√3 - √27 = 3√3 - 3√3 = 0;

b) √5 × (√2 + √5 )=√5 × √2 + √5 × √5=5+√10;

c) (x+5)²=x²+10×x+25;

d) (2x-3)²=(2x)²-2×2x×3+3²=4×x²-12×x+9;

e) (4x-5)(4x+5)=(4x)²-5²=16x²-25;

f) 3x+5-2x-7y+3+x+7y=2x+8;

g) 18x^5/-3x³ +2x(x-1)-24x^4/-2x²=-6x²+2x²-2x+12x²=6x²-2x.