If the zeroes are at x = -1 and at x = 2, then, subtracting, the factor equations were x – (-1)= x + 1= 0 and x - 2 = 0. Then the factors were x + 1 and x - 2. Any factorable quadratic is going to have just the two factors, so these must be them. Then the original quadratic was something like:
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Answer:
Step-by-step explanation:
Find a quadratic with zeroes at - 1 and 2.
If the zeroes are at x = -1 and at x = 2, then, subtracting, the factor equations were x – (-1)= x + 1= 0 and x - 2 = 0. Then the factors were x + 1 and x - 2. Any factorable quadratic is going to have just the two factors, so these must be them. Then the original quadratic was something like:
Answer:
(x + 1)(x- 2) = x^2 – 2x + x - 2
= x^2 - x - 2= 0
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