Question

Which equation is a quadratic equation?

3x − y = 8x + 2

y = 7x(5 − 2x) + 9

7x2 + y = (3 + x)(7x − 1)

y − 3 = (x2 − 3)(8x + 3)

I think it's y = 7x(5 − 2x) + 9 because it looks like it's in standard form but I just want to make sure.

Answer 1

yes..

Answer 2

You would be correct :)

Answer 3

Okay, thanks!

Answer 4

hre are more than one quadratic equations above.

Answer 5

nop.. there are not.

Answer 6

@sami-21 no...that last equation would be a cubic

Answer 7

7x2 + y = (3 + x)(7x − 1)
y = 7x(5 − 2x) + 9

Answer 8

7x^2 cancels up if u evaluate this option

Answer 9

ok its one

Answer 10

correct @nubeer