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(w^2 - 3w) - 10 = 0
w^2-3w - 10
then trying to factor out split the middle term
w^2- 5w + 2w - 10
then factor out
(w + 2) • (w - 5) = 0
w+2=0....... therefore, w=-2
w-5= 0........therefore w= 5
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