Question

Rezolvati in R ecuatiile
a) (x-1)la puterea 2 =4
b) (1-2x)la puterea 2 =25
c) 2(x-2)la puterea 2 =8
d) (x+1) la puterea 2 -16 =0

Answer 1

a) (x-1) la puterea 2=4 => x-1= +sau-2 => x-1 ={ -2,2}=> x={-1,3}
b) (1-2x) la puterea 2= 25=> 1-2x=+ sau-5=> 1-2x={-5,5}=> 2x={-4,6}=? x={-2,3}
c)2(x-2) la puterea 2=8=> x-2 ={-4,4}=> x={-2,6}
d) (x+1) la puterea 2=16=> x+1={-4,4}=> x={-5, 3}