Question

The coefficient of x in the equation ax2+bx+c=0 was wrongly taken as 17 instead of 13 and its roots were -2,-15. What are the actual roots?

Answer 1

Step-by-step explanation:

(x+2)(x+15)=0

x^2+17x+30=0

actual equation

x^2+13x+30=0

x^2+3x+10x+30=0

x(x+3)+10(x+3)=0

(x+3)(x+10)=0

x=-3,-10