Question

which of the following is a quadratic equation a)​

Answer 1

Answer:

a2+b2+c2=0 is the quadratic equation

Answer 2

Answer:

i) As highest Power is '1' ∴ not quadratic

ii) (x−1)(x+4)=x

2 +1⇒x 2 +3x−4=x 2 +1⇒ 3x−5=0

∴ not quadratic (higher degree 1)

iii) Highest delrle is '2' ∴ quadratic

iv) (2x+1)(3x−4)=6x 2

+3⇒6x 2 −5x−4=6x 2 +3

⇒5x+7=0 (∴ not quadratic)

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