Question

х²-144=0
x²+25=0
x²-5=0
(x-1)²=9
(x+5)=0

 

Answer 1

х²-144=0

x²=144

x=±12

 

x²+25=0

x²=-25

x ∈ ∅⇒нет реш.

 

x²-5=0

x²=5

x=±√5

 

(x-1)²=9

x²-2x-8=0

D=36

x=-2

x=4