Question

Sonia graphs the equations y = –x2 + 4x and y = x – 4 to solve the equation –x2 + 4x = x –

Answer 1

x>=2
https://www.youtube.com/watch?v=wJbQHTNZbHQ
 X=2

Answer 2

Answer:

The solutions of the equation $-x^2+4x=x-4$ is:

               x= -1 and x=4

Step-by-step explanation:

The solution of the graphs of the equation is equal to the x-value of the point of intersection of the graph of two functions i.e. the function on the left side of the equality on the right side of the equality.

Here, the expression is:

$-x^2+4x=x-4$

Hence, we will see at which point the graph  of:

$y=-x^2+4x$

and $y=x-4$ meet.

The point of intersection of the graph is: (-1,-5) and (4,0).

Hence, the solution of the graph is: x= -1 and x=4