Answer:
A I think im fairly certain
Step-by-step explanation:
Answer:
6:150
Step-by-step explanation:
If you like my answer mark me brainliest
Answer:
x= -8
collect like term than divide both sides
6x-4x = -20+4
2x= -20+4
2x=-16
x= -8
Answer: Completing the square changes the value of the equation.
Step-by-step explanation:
For example we have expression : ![x^2+ax](https://tex.z-dn.net/?f=x%5E2%2Bax)
which is equivalent to ![x^2+2\frac{a}{2}x](https://tex.z-dn.net/?f=x%5E2%2B2%5Cfrac%7Ba%7D%7B2%7Dx)
We add and subtract
to form a complete square.
![x^2+ax+(\frac{a}{2})^2-(\frac{a}{2})^2](https://tex.z-dn.net/?f=x%5E2%2Bax%2B%28%5Cfrac%7Ba%7D%7B2%7D%29%5E2-%28%5Cfrac%7Ba%7D%7B2%7D%29%5E2)
, where
is a perfect square binomial.
Thus, the true statements about the completing squares are:-
- Completing the square will always work.
- When completing the square you add and subtract the same value to the equation.
- When completing the square you create a perfect square binomial.
Completing the square does not change the value of the equation.
Answer:
No mistake
Step-by-step explanation:
2x + y = 5
x - 2y = 10
y = 5 - 2x
x - 2(5 - 2x) = 10
x - 10 + 4x = 10
5x - 10 = 10
5x = 20
x = 4
2(4) + y = 5
y = -3
She made no mistake
You can check by plugging in x = 4 and y = -3 into the original equations . They fit exactly.