Answer:
B.
Step-by-step explanation:
Answer:
A is correct
Step-by-step explanation:
What we need to do here is to multiply all the roots together
The roots are;
3, √5 and -√5
Let’s have them in form of a sum
if x = 3, then the root is x-3
If x = √5, then the root is x-√5
If x = -√5, then the root is x+ √5
Now we need to multiply all these together to arrive at the original polynomial
Let’s start by using the roots
(x-√5)(x+ √5)
we can use the difference of 2 squares here and we arrive at (x^2 -5)
So finally, the polynomial would be;
(x^2-5)(x-3)
= x(x^2-5) -3(x^2-5)
= x^3-5x-3x^2+15
By rearranging, we have;
x^3-3x^2-5x+15
(3/4) / (15/28) = (3*28) / (4*15) = 84/60 = 42/30 = 21/15 = 7/5
Cosx = 3/5.8
x = cos^-1 (3/5.8) = 58.85
b is equal to 1
Step-by-step explanation:
I guessed and it came to be the right answer.
