Question

найдите корни неравенства 25х2-1=0

Answer 1

(5х-1)(5х+1)=0

5х-1=0       5х+1=0

5х=1           5х=-1

х=1/5=0.2  х=-1/5=-0.2

Answer 2

(5х-1)(5х+1)=0

5х-1=0       5х+1=0

5х=1           5х=-1

х=1/5=0.2  х=-1/5=-0.2

Ответ:x1=0.2x2=-0.2