Are (5x - 2x^2 + 7) and (2x^2 - 5x + 7) the same?

Finding equality or difference:
= (5x - 2x² + 7) - (2x² - 5x + 7)
= 5x - 2x² + 7 - 2x² + 5x - 7
= 10x - 4x² OR 2(5x - 2x²)

Answer: No. There is a difference of 2(5x - 2x²) between the two expressions.

no

No, they are not the same!!
As you can see, there is a sign change b/w the first two in both the cases!!

2x^2 - 5x + 7
= -5x + 2x^2 + 7

Compare with 5x - 2x^2 + 7.
Are they the same?

No.

it would be the same this way: - (2x^2 - 5x - 7)

NO !