Question

Solve for x? 3x^2-6x-2=4+5x-7x^2

Answer 1

Answer: -2/5 or 3/2

Answer 2

Answer:

3/2 or -2/5

Step-by-step explanation:

Get everything on one side because this is a quadratic....

subtract 4 on both sides

subtract 5x on both sides

add 7x^2 on both sides

this gives us:

10x^2-11x-6=0

Now we can try to factor or just hop right into the quadratic formula

D=b^2-4ac=121-4(10)(-6)=121+240=361

sqrt(D)=sqrt(b^2-4ac)=19 where this is the sqrt(discriminant) so it would have factored nicely since this come out to be a whole number.

Anyways the quadratic formula says to do x=(-b (pm) sqrt(D))/(2a)

*(pm) means plus or minus*

So x=(11 (pm) 19)/(20)

So x=30/20=3/2 or -8/20=-2/5

(do you want to show factored form and do it that way)