Factor the trinomial completely.
-$x^{2}+4 x y-21 y^{2}$
A) $(x-7 y)(x+3 y)$
B) $(x-y)(x+3 y)$
C) $(x-7 y)(x+y)$
D) $(x+7 y)(x-3 y)$

Name: Factor the trinomial completely. -$x^{2}+4 x y-21 y^{2}$ A) $(x-7 y)(x+3 y)$ B) $(x-y)(x+3 y)$ C) $(x-7 y)(x+y)$ D) $(x+7 y)(x-3 y)$
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The Answer of Factor the trinomial completely.
-$x^{2}+4 x y-21 y^{2}$
A) $(x-7 y)(x+3 y)$
B) $(x-y)(x+3 y)$
C) $(x-7 y)(x+y)$
D) $(x+7 y)(x-3 y)$

Factor the Trinomial Completely x2+4xy−21y2x^{2}+4 x y-21 y^{2}x2+4xy−21y2 A) (x−7y)(x+3y)(x-7 y)(x+3 y)(x−7y)(x+3y)

Factor the Trinomial Completely $x^{2}+4 x y-21 y^{2}$ A) $(x-7 y)(x+3 y)$