5x + 4 = 3x - 2
Subtract 4 from both sides:
5x = 3x - 6
Subtract 2x from both sides:
2x = 6
Divide both sides by 2:
x = -3
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f(x) = 3x2 + 5x + 2fprime(x) = 6x + 5
x=6
If X = 4 then 5X is equal to 5 x 4 which is 20. So 20 + 2 = 22.
Differentiate the function with respect to x: d/dx (x3 - 2x2 - 5x + 6) = 3x2 - 4x - 5 Set this derivative = 0 and solve. 3x2 - 4x - 5 = 0 implies that x = -0.7863 or 2.1196 (to 4 dp)
5x+3y