(5x
2
- 8x + 1) + (2x
2
- 4x - 11)
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6 + 2x = 5x + 9 , 6 - 9 = 5x - 2x , -3 = 3x , x = -1
2(3x + 4) + 5x - 2
5x + 4 = 3x - 2Subtract 4 from both sides:5x = 3x - 6Subtract 2x from both sides:2x = 6Divide both sides by 2:x = -3
3x-4=5x+6 gives: 2x=-10 which gives x=-5
f(x) = 3x2 + 5x + 2fprime(x) = 6x + 5