Can someone help me please!!
2 answers:
Answer:
Yes I can. So I will.
Step-by-step explanation:
Anytime you found yourself in doubt and danger about equations, you can use Geogebra Graph Calc - search for it -, and he will show you the graphic.
But, as I know that you are one the <em>LAST HEROES IN EARTH,</em> I pretty sure you don't want to just surrender yourself for a computer machine.
Let's calculate it:
4x² - 39x + 77
Bháskara Formula, you probably know her as <em>Resolutive Formula</em>, as she is known in my country, is:
there is also two signals + - betwen -b and the root.
She's one of the best ways to find roots for quadratic equations.
We will need to do that to find the interval required.
Also, remember that a generic quadratic equation can be describe as:
ax² + bx + c
So, knowing that in this equation
a = 4 / b = -39 / c = 77
We can proceed.
x' = - (-39) + / 2.4
x' = 39 + 17/ 8
x' = 7
x'' = 39 -17/8
x'' = 2,75
Now, you should know that when A > 0 the quadratic equation has her concavity facing down.
As we have the values of the roots, 7 and 2,75, we know that betwen them the equation has negative values.
That also means that all values higher than 7 and lower than 2,75 give to us a positive value.
Final answer:
x<2,75 and x>7
You will see in annex the graphic.
You might be interested in
The one way to determine factors of x³ + 11x² – 3x – 33 will be .
It is the method to separate the polynomial into parts and the parts will be in multiplication. And the value of the polynomial at this point will be zero.
The steps involved in the factorization are;
1. For each pair of parentheses, we create a common factor.
2. We use x2 as a common factor for the first parenthesis.
3. We use common factor 3 for the second parenthesis.
We will find the final solution as .
Hence the one way to determine factors of x³ + 11x² – 3x – 33 will be .
To learn more about the factorization refer to the link;
Answer:
x ≈ 63.27
Step-by-step explanation:
Using the tangent ratio in the right triangle
tan49° = =
=
( multiply both sides by 55 )
55 × tan49° = x , then
x ≈ 63.27 ( to the nearest hundredth )