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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.
 one year ago
 one year ago
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.
 one year ago
 one year ago

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johnweldon1993Best ResponseYou've already chosen the best response.0
You would be correct :)
 one year ago

sami21Best ResponseYou've already chosen the best response.0
hre are more than one quadratic equations above.
 one year ago

johnweldon1993Best ResponseYou've already chosen the best response.0
@sami21 no...that last equation would be a cubic
 one year ago

sami21Best ResponseYou've already chosen the best response.0
7x2 + y = (3 + x)(7x − 1) y = 7x(5 − 2x) + 9
 one year ago

nubeerBest ResponseYou've already chosen the best response.1
7x^2 cancels up if u evaluate this option
 one year ago

johnweldon1993Best ResponseYou've already chosen the best response.0
correct @nubeer
 one year ago
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