Question

5 Rezolvati ecuatiile, unde x este număr real:
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Answer 1

a. x^2=144 ; x^2-144=0 ;   x=12, x=-12

b. x^2=256 ; x^2-256=0;  x=16, x=-16

c. x^2=400 ; x^2-400=0;   x=20, x=-20

d. x^2=576 ; x^2-576=0;   x=24, x=-24

e. x^2=625 ; x^2-625=0 ;  x=25, x=-25

f. 3x^2=300 ; 3x^2-300=0;  x=-10, x=10

g. 4x^2=324 ; 4x^2-324=0; x=-9, x=9

h. 7x^2=6300 ; 7x^2-6300=0; x=-30, x=30