Question

2N 362
(ii)
From the following equations, which one is the quadratie
equation ?
5
(A)
3 = x2
(B) x(x + 5) = 4
(C)
n - 1 = 2n
1
(D)
72 67
(x + 2) = x​

Answer 1

Explanation:

) x2 + 5x – 2 = 0

Only one variable x.

Maximum index = 2

So, it is a quadratic equation.

(2) y2 = 5y – 10

Only one variable y.

Maximum index = 2

So, it is a quadratic equation.

(3) y2+

1

y

=2

⇒y3+1=2y

Only one variable y.

Maximum index = 3

So, it is not a quadratic equation.

(4) x+

1

x

=-2

⇒x2+1=-2x

Only one variable x.

Maximum index = 2

So, it is a quadratic equation.

Answer 2

Answer:

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