AM-1111
Factorising and solving cubics
A Math · Secondary 4 · Medium · Factorising and solving cubics
Given
p(x)=4x3−11x2−8x+15, it is known that
x−3 is a factor of
p(x). Which of the following is the complete factorisation of
p(x)?
- (x−3)(4x−5)(x+1)
- (x−3)(4x+5)(x−1)
- (x+3)(4x−5)(x−1)
- (x−3)(2x−5)(2x+1)
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