Potato33 Potato33

08-10-2015
Mathematics

contestada

Plz factor
2x^2+17x-21

Respuesta :

soccerabby11 soccerabby11

08-10-2015

2x^2 + 17x -21 cannot be factored nicely, if it was +21 you could, but the zeros for this have to gotten using the quadratic equation

-b +/- (b^2-4ac)^1/2
2a
so

-17 +/- (17^2-4(2)(-21))^1/2
2(2)
-17 +/- (457)^1/2
4

so the zeros are roughly 1.094 and -9.594

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