Question

12. Solve whether x (x+1)+ 8 = (x+2)(x-2) is quadratic
equation or not?​

Answer 1

Answer:

this is not quadratic equation.

here the solution is,

x(x+1)+8= (x+2)(x-2)

x×x +x×1+8= x×x-x×2+2×x-2×2

x^2+x+8= x^2-2x+2x-4

x^2+x+8= x^2-4. (Because -2x+2x=0)

hence, this is not quadratic equation.