Question

Найдите корни урав­не­ния 25x^2-1=0

Answer 1

$25 x^{2} -1=0$
$25x^{2}=1$
$x^{2}$=$frac{1}{25}$
x=$frac{1}{5}$
x=$- frac{1}{5}$

Answer 2

(5x-1)(5x+1) = 0
5x-1 = 0 или 5x+1=0
x = 1/5          x = -1/5