Question

equacao do segundo gral incompleta:

a) 5x²-3125=0

b)x²+x-20=x+10​

Answer 1

a)

$\\5 {x}^{2} -3125=0 \\ {x}^{2} = \frac{3125}{5} \\ x =±\sqrt{625} \\ x =±25$

b)

${x}^{2} + x - 20 = x + 10 \\ {x}^{2} = 20 + 10 \\ {x}^{2} = 30 \\ x = ± \sqrt{30}$