а)1:5x^2-1=0
1:5x^2=1
x^2=1÷1:5
x=+ - √5
б)1:4x^2-45=0
1:4x^2=45
x^2=45÷1:4
x=±√180
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1:5x^2=1
x^2=1÷1:5
x=±√5
1:4x^2-45=0
1:4x^2=45
x^2=45÷1:4
x=±√180
x^2-16=0
(x-4)(x+4)=0
1) x-4=0. 2)x+4=0
x1=4. x2=-4
а)1:5x^2-1=0
1:5x^2=1
x^2=1÷1:5
x=+ - √5
б)1:4x^2-45=0
1:4x^2=45
x^2=45÷1:4
x=±√180