The answer is 20. you'll have to multiply 10 times 3 and get 30. Then you'll subtract the 10 from the 30 and get 20
Answer:
![x = - 4 \: or \: x = - 14](https://tex.z-dn.net/?f=x%20%3D%20%20-%204%20%5C%3A%20or%20%5C%3A%20x%20%3D%20%20-%2014)
Step-by-step explanation:
We have been given the equation
![(x + 9) {}^{2} = 25](https://tex.z-dn.net/?f=%28x%20%2B%209%29%20%7B%7D%5E%7B2%7D%20%20%3D%2025)
and we are asked to apply the square root property of equality to our given a equation and isolate the variable
First, take the square root of both sides of our equation
![\sqrt{(x + 9) {}^{2} } = \sqrt{25}](https://tex.z-dn.net/?f=%20%5Csqrt%7B%28x%20%2B%209%29%20%7B%7D%5E%7B2%7D%20%7D%20%20%3D%20%20%5Csqrt%7B25%7D%20)
![x + 9 = \: 15](https://tex.z-dn.net/?f=x%20%2B%209%20%3D%20%20%5C%3A%2015)
![x + 9 = 5 \: or \: x + 9 = - 5](https://tex.z-dn.net/?f=x%20%2B%209%20%3D%205%20%5C%3A%20or%20%5C%3A%20x%20%2B%209%20%3D%20%20-%205)
![x + 9 - 9 = 5 - 9 \: or \: x + 9 - 9 = - 5 - 9](https://tex.z-dn.net/?f=x%20%2B%209%20-%209%20%3D%205%20-%209%20%5C%3A%20or%20%5C%3A%20x%20%2B%209%20-%209%20%3D%20%20-%205%20-%209)
![x = - 4 \: or \: x = - 14](https://tex.z-dn.net/?f=x%20%3D%20%20-%204%20%5C%3A%20or%20%5C%3A%20x%20%3D%20%20-%2014)
<em>THEREFORE, THERE ARE TWO SOLUTIONS FOR OUR GIVEN EQUATION</em>
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</em>
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We are given the points
<span>(0,-4),(1,0),(2,2)
The standard form a quadratic function (in terms of x) is
y = Ax2 + Bx + C
Subsitute the points
-4 = 0 + 0 + C
C = -4
0 = A + B - 4
2 = 4A + 2B - 4
Solve for A and B
A = -1
B = 5
The function is
y = -x2 + 5x - 4</span>
36 degrees f hope this helps