Solving
we get ![X=2\sqrt{5}\,\,and\,\,X=-2\sqrt{5}](https://tex.z-dn.net/?f=X%3D2%5Csqrt%7B5%7D%5C%2C%5C%2Cand%5C%2C%5C%2CX%3D-2%5Csqrt%7B5%7D)
Step-by-step explanation:
We need to solve the equation: ![4 - X^2 = (-16)](https://tex.z-dn.net/?f=4%20-%20X%5E2%20%3D%20%28-16%29)
Solving:
![4 - X^2 = (-16)](https://tex.z-dn.net/?f=4%20-%20X%5E2%20%3D%20%28-16%29)
Adding -4 on both sides:
![4 - X^2-4 = -16-4\\- X^2 = -20](https://tex.z-dn.net/?f=4%20-%20X%5E2-4%20%3D%20-16-4%5C%5C-%20X%5E2%20%3D%20-20)
Divide both sides by -1
![\frac{-X^2}{-1}=\frac{-20}{-1}\\X^2=20](https://tex.z-dn.net/?f=%5Cfrac%7B-X%5E2%7D%7B-1%7D%3D%5Cfrac%7B-20%7D%7B-1%7D%5C%5CX%5E2%3D20)
Taking square root
![\sqrt{X^2}=\sqrt{20}\\X=\pm\sqrt{20}](https://tex.z-dn.net/?f=%5Csqrt%7BX%5E2%7D%3D%5Csqrt%7B20%7D%5C%5CX%3D%5Cpm%5Csqrt%7B20%7D)
√20 can be simplified as: ![\sqrt{2*2*5}=\sqrt{2^2*5}= \sqrt{2^2}* \sqrt{5}=2 \sqrt{5}](https://tex.z-dn.net/?f=%5Csqrt%7B2%2A2%2A5%7D%3D%5Csqrt%7B2%5E2%2A5%7D%3D%20%5Csqrt%7B2%5E2%7D%2A%20%5Csqrt%7B5%7D%3D2%20%5Csqrt%7B5%7D)
So, value of X is:
![X=\pm2\sqrt{5}\\or:\\X=2\sqrt{5}\,\,and\,\,X=-2\sqrt{5}](https://tex.z-dn.net/?f=X%3D%5Cpm2%5Csqrt%7B5%7D%5C%5Cor%3A%5C%5CX%3D2%5Csqrt%7B5%7D%5C%2C%5C%2Cand%5C%2C%5C%2CX%3D-2%5Csqrt%7B5%7D)
So, solving
we get ![X=2\sqrt{5}\,\,and\,\,X=-2\sqrt{5}](https://tex.z-dn.net/?f=X%3D2%5Csqrt%7B5%7D%5C%2C%5C%2Cand%5C%2C%5C%2CX%3D-2%5Csqrt%7B5%7D)
Keywords: Solving Equations
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Answer:
The change in degrees Fahrenheit for every change of one minute.
Step-by-step explanation:
7.5 × 10-4
That's the scientific notation answer ^
A. 168 explaination: 4* 3= 12 meaning 56 times 3 would be 168