Find the expansion of (x-a)(x-2a)(x-4a)
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(x-a)(x-2a)(x-4a)
⇒(x²+2a²-ax-2ax)(x-4a)
⇒(x²+2a²-3ax)(x-4a)
⇒x³+2a²x-3ax²-4ax²-8a³+12a²x
⇒x³-7ax²+14a²x-8a³
i hope this helps!!
⇒(x²+2a²-ax-2ax)(x-4a)
⇒(x²+2a²-3ax)(x-4a)
⇒x³+2a²x-3ax²-4ax²-8a³+12a²x
⇒x³-7ax²+14a²x-8a³
i hope this helps!!
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