Which of the following equations are not quadratic?

x (2 x + 3) = x + 2

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(x - 2)^{2} + 1 = 2 x - 3

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y (8 y + 5) = y^{2} + 3

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y (2 y + 15) = 2 (y^{2} + y + 8)

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Solution

The correct option is D $y (2 y + 15) = 2 (y^{2} + y + 8)$
As we know that in quadratic equation the highest degree of the polynomial is $2$ . so all the option have degree of the polynomail $2$ except option D. because in option D the degree of the polynimail is $1$ .so the correct option is D

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Similar questions

Which of the following are not quadratic polynomials?
(i) $3 + 4 x - 7 x^{2}$

(ii) $8 x^{2} - 15$

(iii) 6x – 15

(iv) $4 x^{3} - 3 x$

(v) $x^{2} - x + 1$

y^{2} + \frac{1}{y} = 2

x + \frac{1}{x} = - 2

(x + 2)^{3} = 2 x (x^{2} - 1)

(x - 3) (2 x + 1) = x (x + 5)

x^{2} - 3 x + 2 = 0

Which of the following are not quadratic polynomials?
(i) $3 + 4 x - 7 x^{2}$

(ii) $8 x^{2} - 15$

(iii) 6x – 15

(iv) $4 x^{3} - 3 x$

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