Answer:
B) x = 3 or x = -5/2
Step-by-step explanation:
Solve for x over the real numbers:
2 x^2 - x = 15
Subtract 15 from both sides:
2 x^2 - x - 15 = 0
x = (1 ± sqrt((-1)^2 - 4×2 (-15)))/(2×2) = (1 ± sqrt(1 + 120))/4 = (1 ± sqrt(121))/4:
x = (1 + sqrt(121))/4 or x = (1 - sqrt(121))/4
sqrt(121) = sqrt(11^2) = 11:
x = (1 + 11)/4 or x = (1 - 11)/4
(1 + 11)/4 = 12/4 = 3:
x = 3 or x = (1 - 11)/4
(1 - 11)/4 = -10/4 = -5/2:
Answer: x = 3 or x = -5/2
Answer:
b=4
Step-by-step explanation:
g(x)=x^2+bx+11
When x = -1 g(x) = 8
8 = (-1)^2 +b(-1) +11
8 = 1 -b+11
Combine terms
8 = 12-b
Subtract 12 from each side
8-12 = 12-b-12
-4 = -b
Multiply by -1
4 = b
Step-by-step explanation:
<h3>x +5y=30.........(i)</h3>
which is required equation.
Answer:
I believe your favorite subject maybe Science and World geography
Step-by-step explanation:
I am not sure : )
Answer:
![p(x) = 4x^4-9x^3-10x^2-24](https://tex.z-dn.net/?f=p%28x%29%20%3D%204x%5E4-9x%5E3-10x%5E2-24)
Step-by-step explanation:
I'm going to assume that your equation is ![(5x^4-4x^3-2x^2+x-19) - (x^4+5x^3+8x^2+x+5)](https://tex.z-dn.net/?f=%285x%5E4-4x%5E3-2x%5E2%2Bx-19%29%20-%20%28x%5E4%2B5x%5E3%2B8x%5E2%2Bx%2B5%29)
So to evaluate it we need to simplify it. Find like terms and perform addition/subtraction on them.
![p(x) = (5-1)x^4 + (-4-5)x^3+(-2-8)x^2+(1-1)x+(-19-5) \\ \to p(x) = 4x^4-9x^3-10x^2-24](https://tex.z-dn.net/?f=p%28x%29%20%3D%20%285-1%29x%5E4%20%2B%20%28-4-5%29x%5E3%2B%28-2-8%29x%5E2%2B%281-1%29x%2B%28-19-5%29%20%5C%5C%20%5Cto%20p%28x%29%20%3D%204x%5E4-9x%5E3-10x%5E2-24)