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March 27, 2017

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Find the following function

y=[(x-5)(4x+3)]^5

I arrived at 5(6x-2)[(x-5)(4x+3)]^4

The answer is 5(8x-17)[(x-5)(4x+3)]^4
but I am not sure how they got the 8x-17

  • Math - ,

    first line derivative:
    5((x-5)(4x+3))^4 (4(x-5) + (4x+3))
    = 5((x-5)(4x+3))^4 (4x-20 + 4x+3)
    = 5((x-5)(4x+3))^4 (8x - 17)

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