Question

帮手解方程啊.一元二次方程

Answer 1

ax2 + bx + c = 0

当b2 – 4ac > 0,

X1 =(-b+√(b^2-4ac))/2a

X2 =(-b-√(b^2-4ac))/2a

当b2 – 4ac = 0,

X1=X2=(-b)/2a

当b2 – 4ac < 0,在实数范围内无解.