Question

resolver a equaçoes (2 grau)
 

x² + 3x - 10 = 0

Answer 1

∆=3²-4*1*-10
∆=9+40
∆=49

x=(-(+3)±√49)/2
x1= (-3+7)/2=4/2====> x1=2
x²=(-3-7)/2= -10/2====> x2= -5