Step-by-step explanation:
x²+2x-3=0
(x²+3x)-(x-3)=0
x(x+3)-1(x+3)=0
(x-1)(x+3)=0
x=1 or x=-3
With what? I don't see a question
Answer:
12.1
Step-by-step explanation:
We use the formula for the distance between two arbitrary points
and
in the xy-coordinate plane, that is:

So, replacing the points
and
, we obtain:

that is the answer.
note: observe that we only use the coordinates between the two midpoints and not the point J.
Answer:
k = 1
Step-by-step explanation:
=> y ∝ x²
So, y = kx² ----------------------------(1)
<u><em>Where k is the constant of proportionality</em></u>
Now,
y = 9 when x = 3
Putting in (1)
=> 9 = k(3)²
=> 9 = k(9)
Dividing both sides by 9
=> k = 1