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
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)