How do you factor #20x^3-125x=0#?

1 Answer
Tony B
Aug 2, 2016

#5x(2x-5)(2x+5)#

Explanation:

Factor out as much as you can from both

#5x(4x^2-25)#

,........................................................
Consider the example
#a^2-b^2 = (a-b)(a+b)#
,..........................................................
Applying the method in the example

Write as: #" "5x[ (2x)^2-5^2]# giving:

#5x(2x-5)(2x+5)#

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