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kobz
07.03.2021 •
Mathematics
Use the quadratic formula to solve for x. 5x² + 4x=4 Round your answer to the nearest hundredth. If there is more than one solution, separate them with commas.
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Ответ:
Quadratic formula is:
(-b-/+ sqrt b^2-4ac)/2a
We need to get the function to equal zero so we subtract 4 from both sides.
5x^2+4x-4=0 is out new equation.
a=5, b=4 and c=-4
Now we can solve by plugging in the variables!
-4+ sqrt 4^2-4(5)(-4)/2(5)= 0.5797
Do the same with subtracting because of the plus OR minus
-4-sqrt 4^2-4(5)(-4)/2(5)= -1.3797
Rounded to the nearest 100th will be:
x= -1.38, x=0.58
You can check your answer by plugging them back into the original function— you should get zero. :)
Ответ:
Step-by-step explanation:
The domain is the horizontal extent: all real numbers. -∞ < x < ∞.
The range is the vertical extent: all numbers greater than zero. 0 < y < ∞. (The graph never actually touches y=0, but comes arbitrarily close.)