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= 4xkuadrat + 40x +100
b.a(a+2)(4a-5) = a(4akuadrat +3a -20)
= 4a pangkat 3 + 3a kuadrat -20a
c.3xkuadrat (2xkuadrat - y)(xkuadrat+5y) = 3x kuadrat (2xpangkat4 +9xkuadraty - 5ykuadrat)
= 6x pangkat 6 +18xpangkat4 y - 15xkuadrat ykuadrat
= 4 ( X²+10X+25)
=4X²+40X+100
e. (a²+2a) (4a-5)
(4a³-5a²+8a²-10a)
(4a³+3a²-10a)
f. sama caranya seperti yang 'e'