How to draw the graph of y=-x^2+4x-5 and to use it to solve the equation x^2+4x-5 without using a table of values

iyo assignment umepewa tukufanyie sio, ok hapa, nilipe ni draw graph dka 1 tu
 
Hint :Graph intersects Y-axis at x=0 , y=-5. It intersects X-axis at two points x=1, y =0 and x=-5,y=0. Sketch the graph. Solution to equation are points where graph intersects line y=10.
 
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