-2x^2+7x=10

hey samhowell  we can use this formula for that question bt ur formula is worong . bcz, we use b^2 -4ac bt u use b^2 -2ac so that answer is wrong.

-2x^2+7x=10   subtract 10 from both sides

-2x^2 + 7x - 10  = 0

Note that  b^2 - 4ac = 49 - (4)(-2)(-10) = 49 - 80 = -31

So......this polynomial has no real roots...!!!

https://www.youtube.com/watch?v=O8ezDEk3qCg

Here's the graph....notice that it does not intercept the x axis.....thus, no real roots

GRAPH

melody that's a very interseting song

Thanks Sasini,

I think that it helps people remember the formula :)