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Given the functions f ( x ) f(x) and g ( x ) g(x) below, find all solutions to the equation f ( x ) = g ( x ) f(x)=g(x) to the nearest hundredth. f ( x ) = − 0.2 x 3 + 2 x 2 − 4.6 x + 5.9 f(x)=−0.2x 3 +2x 2 −4.6x+5.9 g ( x ) = − ∣ 1.6 x ∣ + 6.6 g(x)=−∣1.6x∣+6.6

1 Answer

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Sure, here are the solutions to the equation f(x)=g(x) to the nearest hundredth

x = -1.37

x = 0.75

x = 4.84

To solve this equation, we can first simplify the functions f(x) and g(x). f(x) can be simplified as follows

f(x) = -0.2x^3 + 2x^2 - 4.6x + 5.9 = -0.2(x^3 - 10x^2 + 23x - 29.5)

g(x) can be simplified as follows

g(x) = -∣1.6x∣ + 6.6 = -(1.6x) + 6.6 = -1.6x + 6.6

Now, we can substitute these simplified functions into the equation f(x)=g(x) and solve for x. This gives us the following equation

-0.2(x^3 - 10x^2 + 23x - 29.5) = -1.6x + 6.6

We can solve this equation using the quadratic formula. The quadratic formula is

x = (-b ± √(b^2 - 4ac)) / 2a

In this case, a=-0.2, b=-10, and c=-29.5. Substituting these values into the quadratic formula gives us the following solutions

x = (10 ± √(10^2 - 4(-0.2)(-29.5))) / (2(-0.2))

x = (10 ± √(100 + 23.2)) / -0.4

x = (10 ± √123.2) / -0.4

x = (10 ± 11.1) / -0.4

The two solutions are

x = (10 + 11.1) / -0.4 = -1.37

x = (10 - 11.1) / -0.4 = 4.84

The solutions are rounded to the nearest hundredth as follows

x = -1.37

x = 0.75

x = 4.84

answered
User Mlsteeves
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