marlisamoore
marlisamoore
21-08-2017
Mathematics
contestada
factor the trinominal below
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mreijepatmat
mreijepatmat
21-08-2017
x²+7x-30
Find the roots of this trinomial:
x' = [-b+√(b²-4ac)]/2a] and x" = [-b-√(b²-4ac)]/2a]
x' = [-7+√(7²-4(1)(-30)]/2 and x" = [-7-√(7²-4(1)(-30)]/2
x' = 3 and x" = -10
a(x-x')(x-x")
(x-3)(x+10) [Answer A]
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