Question

Which of the following is a quadratic equation?
a) x+1/x=x² b) 3x - 5x = (x-2)²
c) x+5=0
d) 6x + 1/2x= -9=0​

Answer 1

Answer:

the answer is b

Step-by-step explanation:

A quadratic equation is an equation which can be expressed in the form of ax^2 + bx +c

for option b

3x-5x=(x-2)^2

-2x=x^2-2x+4. [(a-b)^2=a^2-2ab+b^2]

x^+4=0

here a=1 b=0 and c=4

therefore it is a quadratic equation.

Hope it helps....