Question

x^2-16x+60=0用公式法和因式分解法解方程.

Answer 1

a=1,b=-16,c=60

x1= (-b+sqrt(b^2-4ac))/2a =(16+sqrt((-16)^2-4*1*60)/2= 10

x2= (-b-sqrt(b^2-4ac))/2a = 6

或者 x^2-16x+60=0 => (x-10)(x-6)=0 => x = 10 或 x = 6