Answer:
60x^3-253x^2+308x-122
Explanation:
(4x-5)^3-(x^2+4x+1)(4x-3)
=64x^3-240x^2+300x-125-(x^2+4x+1)(4x-3)
=(4x)^3-3(4x)^2*5+3*4x*5^2-5^3
=64x^3-240x^2+300x-125
=-(4x^3+13x^2-8x-3)
=-(4x^3)-(13x^2)-(-8x)-(-3)
=-4x^3-13x^2+8x+3
=64x^3-240x^2+300x-125-4x^3-13x^2+8x+3
=64x^3-4x^3-240x^2-13x^2+300x+8x-125+3
=64x^3-4x^3-253x^2+300x+8x-125+3
=60x^3-253x^2+300x+8x-125+3
=60x^3-253x^2+308x-125+3
=60x^3-253x^2+308x-122
So the Answer is 60x^3-253x^2+308x-122.
God Bless, Hope it helps!!!!!!!