Factor 121x^2-224y^4

121x2 -224y4

(11x )(11x ) ( +4y2)( -56 y2)

(11x+4y2)(11x-56y2)

check:

(11x+4y2)(11x-56y2)

(11x)(11x) (11x)(-56y2) (+4y2)(11x) (+4y2)(-56y2)

11x2 -2464xy2 +44xy2 -224y4

11x2 -2420xy2 -224y4

No

Factor

121x2 -224y4

(11x )(11x ) ( - 8y2)( +28y2)

(11x-8y2)(11x+28y2)

(11x)(11x) (11x)(28y2) (-8y2)(11x) (-8y2)(+28y2)

121x2 +308xy2 -88xy2 -224y4

121x2 +220xy2 -224y4

No

Check:

121x2 -224y4

(11x+8y2) (11x-28y2)

(11x)(11x) (11x)(-28y2) (+8y2)(11x) (+8y2)(-28y2)

121x2 -308xy2 +88xy2 -224y4

121x2 -220xy2 -224y4

No

121x2 -224y4

(11x )(11x ) ( +14y2)( -16y2)

(11x+14y2)(11x-16y2)

Check:

(11x+14y2)(11x-16y2)

Can not be factored