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professor190 [17]
3 years ago
13

-3x² - 4x – 8=0 Does anyone know how to solve this?

Mathematics
1 answer:
sveta [45]3 years ago
7 0

Answer:

That is a quadratic equation.

It can be solved by using the quadratic formula:

x = (-b +-sqr root b^2 -4*a*c) / 2 *a

In this equation a = -3

b = -4 and c = -8

x = (--4 +- sqr root (-4^2 - 4 * -3 * -8)) / (2 * -3)

x = (4 +- sqr root (16 -96)) / -6

x = 4 +- sqr root (-80) / -6

x1 = (4 +8.94427191 * i)  / -6

x2 =(4 -8.94427191 * i)  / -6

Remember that "i" is the square root of minus 1.

 

Step-by-step explanation:

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Since we determined that both our original functions are linear equation, this means that both our functions will have a constant rate of change.

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D) The rate of change of either f(x) or g(x) must be 0.

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Remember that horizontal lines have a slope of 0. In other words, the rate of change is 0.

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And we're done!

Edit: Some (minor) errors in reasoning. Sorry!

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