Ответ:
Объяснение:
1) 1/5x^2 -5=0, 1/5x^2=5, x^2=25, x=+-5
2)9y^2 =6,25, y^2=6,25 /9, y=+-2,5/3=+-5/6
4) 5/7x^2-x^2=-7/2, -2/7x^2=-7/2, x^2=49/4, x=+-7/2=+-3,5
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Answers & Comments
Ответ:
Объяснение:
1) 1/5x^2 -5=0, 1/5x^2=5, x^2=25, x=+-5
2)9y^2 =6,25, y^2=6,25 /9, y=+-2,5/3=+-5/6
4) 5/7x^2-x^2=-7/2, -2/7x^2=-7/2, x^2=49/4, x=+-7/2=+-3,5