How do you multiply #(\frac { 1} { 5} x ^ { 4} - 30) ( \frac { 4} { 5} x ^ { 4} + 20)#?

1 Answer
Binayaka C.
Jul 4, 2018

#= 4/25( x^8-125 x^4 - 3750)#

Explanation:

# (1/5 x^4-30)(4/5 x^4+20)#

#= (1/5*4/5 x^8+20*1/5 x^4 -30*4/5 x^4- 30*20)#

#= (4/25 x^8+4 x^4 -24 x^4 - 600)#

#= (4/25 x^8-20 x^4 - 600)#

# = 4/25( x^8-125 x^4 - 3750)# [Ans]

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