Answer:
2,000
Step-by-step explanation:
The computation of the price that should be sold for making 25% profit is shown below:
Let cost price be x
Now the equation would be
(1,920 - x) ÷ x × 100 = (x - 1,280) ÷ x × 100
1,920 - x = x - 1,280
2x = 3,200
x = 1,600
Now the sale price would be
= 1,600 × 1.25
= 2,000
The correct answer is
![A) x^2 - 6x + 9](https://tex.z-dn.net/?f=A%29%20x%5E2%20-%206x%20%2B%209)
In fact, this is a trinomial of the form
![ax^2-bx+c](https://tex.z-dn.net/?f=ax%5E2-bx%2Bc)
, whose solutions are given by
![x_{1,2}= \frac{-b\pm \sqrt{b^2 -4ac} }{2a}](https://tex.z-dn.net/?f=x_%7B1%2C2%7D%3D%20%20%5Cfrac%7B-b%5Cpm%20%5Csqrt%7Bb%5E2%20-4ac%7D%20%7D%7B2a%7D)
Using this formula for the trinomial of the problem, we find:
![x1,2= \frac{6 \pm \sqrt{6^2-4\cdot 1\cdot 9}}{2} =3](https://tex.z-dn.net/?f=x1%2C2%3D%20%20%5Cfrac%7B6%20%5Cpm%20%5Csqrt%7B6%5E2-4%5Ccdot%201%5Ccdot%209%7D%7D%7B2%7D%20%3D3)
<span>we see that this trinomial has two coincident solutions (x=3 with multiplicity 2). This means that it can be rewritten as a perfect square, in the following form:
</span>
![(x-3)^2](https://tex.z-dn.net/?f=%28x-3%29%5E2)
<span>
</span>
Answer:
the answer to your question is 'b'
Answer:
Work:
x^2 + 4x - 4 = 8
x^2 +4x -12 = 0
(x + 6) (x - 2) = 0
x = -6 and 2
Answer: first option
I hope this helps!
Step-by-step explanation:
did this on edge :)
hope this helps ~ xoxo ANGIEEE CRAZZZY :3