For this case we have the following equation:
We must solve the equation by following the steps below:
We subtract 1 from both sides of the equation:
On the right side of the equation we have that different signs are subtracted and the sign of the major is placed:
We add x to both sides of the equation:
We divide between 4 on both sides of the equation:
Thus, the correct option is option B
Answer:
Option B
Answer:
The roots are;
x = (2 + i)/5 or (2-i)/5
where the term i is the complex number representing the square root of -1
Step-by-step explanation:
Here, we want to use the completing the square method to solve the quadratic equation;
f(x) = -5x^2 + 4x -1
Set the function to zero
0 = -5x^2 + 4x - 1
So;
-5x^2 + 4x = 1
divide through by the coefficient of x which is -5
x^2 - 4/5x = -1/5
We now take half of the coefficient of x and square it
= -2/5^2 = 4/25
add it to both sides
x^2 - 4x/5 + 4/25= -1/5 + 4/25
(x- 2/5)^2 = -1/5 + 4/25
(x - 2/5)^2 = -1/25
Take the square root of both sides
x - 2/5 = √( -1/25
x - 2/5 = +i/5 or -i/5
x = 2/5 + i/5 or 2/5 - i/5
Answer:
36(5)^-2.
Step-by-step explanation:
5^-2 * 9
= 9(5)^-2
2^4 * 4 ^ -3
= 2^4 + (2^2)^-3
= 2^4 * 2^-6
= 2^-2
So the answer is
9(5^)-2 / 2^-2
= 9(5)^-2 * 2^2
= 4*9(5)^-2
= 36(5)^-2.
Answer:
i really dont know how to do this
Step-by-step explanation:
Answer:
-6
Step-by-step explanation:
(-10) - (-4)
-10 +4 (because negative multiply by negative is positive)
= -6 (because -10+4 means different signs means you subtract and get the sign of the bigger number)
