Question

Which of the following is not a quadratic equation? निम्नलिखित में से कौन सा एक दो घातीय समीकरण नहीं है? *

x²-2x=(-2)(3-x)
Option 1

x³-4x²-x+1=(x-2)³
Option 2

x²+3x+1=(x-2)²
Option 3

x²+1=x(1-x)
Option 4

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Answer 1

Answer:

option 3

Step-by-step explanation:

because

x²+3x+1=(x-2)²

x²+3x+1=x²-4x+4

3x+1=-4x+4_____(x² get cancel)

it is not quadratic equation