= systèmes d'équations suivants. Trouve ensuite sa solution
b) { y = -x + 1
y = -2x - 2

Solving the equations we get: x = -3, y = 4

The solution set is: (-3,4)

Step-by-step explanation:

We need to solve the system of equation and find value of x and y

The system of equation given is:

Let:

We would use substitution method.

Put value of y from eq(1) into eq(2) and find value of x

So, we get x = -3

Now, for finding value of y, put value of x = -3 into equation 1

So, we get y=4

Solving the equations we get: x = -3, y = 4

The solution set is: (-3,4)

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

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step-by-step explanation: