ow do i factor 2x^2-21+40
( 4x-?)(x+?)

Question

ow do i factor 2x^2-21+40  
( 4x-?)(x+?)

mathmale · Answer

Which methods of factoring binomials have worked for you before?
1) factoring by grouping
2) quadratic formula
3) synthetic division
4) long division

Please double-check the polynomial you've posted here.  Seems to me that something's missing.

anonymous · Answer

quadratic formula  2x^2 -21+ 40

mathmale · Answer

something is still missiong from your polynomial.  Check again to ensure that you've copied everything down.

Once you have this polynomial (actually, a trinomial), identify a, b and c.

Then substitute your values for a, b and c into the quadratic equation, to solve for x.

anonymous · Answer

ok I will check