Question

resolverlo por formula general: x²-25=0​

Answer 1

x²-25=0.

$\boxed{ \frac{ - b± \sqrt{b {}^{2} - 4 ac} }{2a} } \\ x {}^{2} - 25 = 0 \\ a = 1 \\ b = 0 \\c = - 25 \\ \boxed{ \frac{ - 0± \sqrt{0 {}^{2} - 4 \times 1( - 25) } }{2 \times 1}}$

x= ±10/2

10/2

x=-10/2

$\boxed{x = 5 \: x = - 5}$