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How do you factor #250x^4 +128x#?

1 Answer

Nov 23, 2016

#250x^4+128x#

#=2x(125x^3+64)#

Use the rule : #a^3 + b^3 = (a + b)(a^2 – ab + b^2)#
#=(2x)[(5x)^3+(4)^3]#

#=(2x)(5x+4)((5x)^2-(5x)(4)+4^2)#

#=(2x)(5x+4)(25x^2-20x+16)#

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