factorise 64p³+48p²q+12pq²+q²
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64p³+48p²q+12pq²+q³
=64p³+q³+48p²q+12pq²
=(4p)³+q³+12pq(4p+q)
=(4p)³+q³+3×4p×q(4p+q)
=(4p+q)³
=(4p+q)(4p+q)(4p+q)
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