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HELP‼️ How do I work it out, I need the working out method too

HELP‼️ How do I work it out, I need the working out method too-example-1
User Sarreph
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Factorise it, it will be (x+2)(x-1) take the average of -2 and 1 (the opposites of the factored numbers) so the average is -2+1/2 which equals -1/2 now sub -1/2 into the factored expression, giving -1/2 (-1/2+4/2)(-1/2-2/2) simplying this we get 3/2 times -3/2 which equals -9/4 so the coordinates of the turning point are -1/2 and -9/4, now look at the graph, look where the graph touches the x axis, it is at -2 and 1, so these are your (roots).
User Noor H
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