Question

1. rezolvati ecuatiile in R
a. x ²=121
b. x²= 4 pe 49
c. x²=17 pe 9
d. ( x+2)²=225
2. rezolvatii ecuatile
a. (x+√2)²=27
b. ( x-1)²
=0,01
d. ( x+√5)²=14+6√5

Answer 1

A x=11 b x= 2 pe 7 c x=radical de 17 pe 3

Answer 2

1)

a) x=+/-V121=+/-11

b) x=+/-V(4/49)=+/-(2/7)

c) x=+/-V(17/9)=+/-(V17)/3

d) x+2=+/-V225
    x+2=+/-15
    x=-17 sau x=13

2)

a)
x+V2=+/-V27
x+V2=+/-3V3
x=-V2+/-3V3

b)
(x-1)^2=0,01=1/100
(x-1)=+/-1/10
x=1+/-1/10
x=9/10 sau x=11/10

c)
x+V5=+/-V(14+6V5)
x=-V5+/-V(14+6V5)