2x^2-3=a
a^2-6a+5=0
D=36-20=16
a1=(6+4)/2=5; 2x^2-3=5;x^2=4; x=+-2
a2=(6-4)/2=1; 2x^2-3=1; x^2=2; x=+-√2
ответ x={-2;2;-√2;√2}
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2x^2-3=a
a^2-6a+5=0
D=36-20=16
a1=(6+4)/2=5; 2x^2-3=5;x^2=4; x=+-2
a2=(6-4)/2=1; 2x^2-3=1; x^2=2; x=+-√2
ответ x={-2;2;-√2;√2}