How do you Factor 2x^4+x^2-6

Use u subsitution

u=x²

2u²+u-6

now do ac method

2 times - 6=-12

what 2 numbers multiply to - 12 and add to get 1

-3 and 4

split the middle temr like that

2u²+4u-3u-6

group

(2u²+4u) + (-3u-6)

factor

2u (u+2) + (-3) (u+2)

undistribue

(2u-3) (u+2)

u=x²

(2x²-3) (x²+2)

(2x^2-3) (x^2+2)

this is the answer