Distribute the 6 to 2x - 11
12x - 66 + 15 = 21
12x = 72
x = 6
Answer:
1st angle = 30
2nd angle = 60
3rd angle = 90
Step-by-step explanation:
- let ,1st angle be x , 2nd angle be 2x and 3rd angle be 3x
- x+2x +3x =180
- 6X =180
- x =180/6
- x =30
<h3>
Answer: x-3</h3>
Since p(3) = 0, this means x = 3 plugs into p(x) to get 0
We can write p(x) as p(x) = (x-3)q(x) where q(x) is some other polynomial that multiplies with (x-3) to lead to x^3-3x^2-x+3
Let's plug in x = 3 and see what happens
p(x) = (x-3)q(x)
p(3) = (3-3)q(3)
p(3) = 0*q(3)
p(3) = 0
No matter what the result of q(3) was, it doesn't matter because it multiplies with 0 to get 0.
The general rule is: if p(k) = 0, then x-k is a factor of p(x). This is a special case of the remainder theorem.
