Q. 23.5( 19 Votes )

# Which of the following equations is quadratic?

(1) x^{2} + 2x + 11 = 0

(2) x^{2} – 2x + 5 = x^{2}

(3) (x + 2)^{2} = 2x^{2}

Answer :

1. is a quadractic equation because it is the form of and it has degree 2.

2.

∴ it is not a quadratic equation because it is not in the form of and it doesn’t have degree 2.

3.

is a quadractic equation because it is the form of and it has degree 2.

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MHB - Mathematics Part-1