Juive me following syster
2x - 4y = 12
-2x + y = -9

x=4,y=-1

Step-by-step explanation:

2x-4y=12...(1)

-2x+y=-9...(2)

Add (2) from (1)

-3y=3

Make y the subject of the formula by dividing both sides by -3

y=-1

Let's substitute the value of y into (1)

2x-4(-1)=12

2x+4=12

Substrate 4 from both sides

2x=8

Make x the subject of the formula by dividing both sides by 2

x=4

Therefore x is 4,y is-1

if the eqn of the parabola is f(x) = (x-4)(x+2), we need to mult. this out to find the coordinates of the vertex.

then f(x) = x^2 + 2x - 4x - 8, and f(x) = x^2 - 2x - 8.

one way in which you can find the vertex is to calculate x = -b / (2a).   here, that comes to

        )

x = = 1.   f(1) = 1^2 - 2(1) - 8 = - 9.   vertex is at (1, -9).

        2(1) 

find another point on the curve:   let x=0, for which y=-8.   then (0, -8) is on the curve.   plot the vertex and this point and draw a smooth parabola thru both.

hope this