Step-by-step explanation:
Given expression is x⁴-kx²+4 =0
x−2 is a factor of the given expression.
So, x=2
Substitute in the equation, we get
2⁴-k(2)²+4
⇒16+4k+4=0
⇒4k=−20
⇒k=−5
Answer:
The difference between their bonus is £2.60
Step-by-step explanation:
The bonus Tom receives is 30% of £96
Tom's bonus


So the bonus Tom received is £28.8
From the question, Sally gets a bonus of £31.40
We need to find the difference between the bonus Tom gets and the bonus Sally gets.
This given by:
£31.40 -£28.8=£2.60
Answer:
(2, 3).
Step-by-step explanation:
3x+2y=12
6x+3y=21 Multiply the first equation by 3 and the second by 2:
9x + 6y = 36
12x + 6y = 42 Subtract:
-3x = -6
x = -6/-3 = 2.
Plug x = 2 into the first equation:
3(2) + 2y = 12
2y = 12 - 3(2)
2y = 6
y = 3.
I'm not following. What's the question?