Answer:
Solution is not correct.
Step-by-step explanation:
Given question is incomplete; Here is the complete question.
Is the solution shown in the attachment correct ?
9x + 2 = 8x² + 6x
We have to solve this equation with the help of quadratic formula,
-8x² + 9x + 2 = 6x
-8x² + 9x - 6x + 2 = 0
-8x² + 3x + 2 = 0
Quadratic formula of a standard quadratic equation (ax² + bx + c = 0) is,
x = ![\frac{-b\pm\sqrt{b^{2}-4ac}}{2a}](https://tex.z-dn.net/?f=%5Cfrac%7B-b%5Cpm%5Csqrt%7Bb%5E%7B2%7D-4ac%7D%7D%7B2a%7D)
By comparing our equation with the standard quadratic equation,
a = -8
b = 3
c = 2
By substituting the values of a, b and c in the quadratic formula,
x = ![\frac{-3\pm\sqrt{(3)^{2}-4(-8)(2)}}{2(-8)}](https://tex.z-dn.net/?f=%5Cfrac%7B-3%5Cpm%5Csqrt%7B%283%29%5E%7B2%7D-4%28-8%29%282%29%7D%7D%7B2%28-8%29%7D)
x = ![\frac{-3\pm\sqrt{9+64} }{-16}](https://tex.z-dn.net/?f=%5Cfrac%7B-3%5Cpm%5Csqrt%7B9%2B64%7D%20%7D%7B-16%7D)
x = ![\frac{9\pm\sqrt{73}}{16}](https://tex.z-dn.net/?f=%5Cfrac%7B9%5Cpm%5Csqrt%7B73%7D%7D%7B16%7D)
Therefore, the given solution is not correct.
Answer:
$211.12
Step-by-step explanation:
Answer:
(-1, -8)
Step-by-step explanation:
So you would do the simplifying by "subtracting" the equations from each other. So to isolate the x, you could subtract the y away.
8x + y = -16
-3x + y = -5
-___________
11x = -11
x = -1
Then, substitute x into either equation.
8(-1) + y = -16
-8 + y = -16
Isolate y.
y = -8