Question

what are the root of the quadriatic equation x²=9?​

Answer 1

Answer:

2 is the root of the equation

Answer 2

x^2=9

x^2-9=0

x^2-(3)^2

here (a+b)(a-b)=a2-b2

(x+3) (x -3)=0

x+3=0;x-3=0

x=-3;x=3