Question

If 2 is the root of the equation x square + bx + 12 and the equation has equal roots, then find the value of b

Answer 1

If one root of the equation is 2 Substitute x=2 in the given equation x^2+bx+12=0 2^2+b*2+12=0 4+2b+12=0 2b+16=0 2b=-16 b=-16/2 b= -8