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OpenStudy (anonymous):
Find a and b for the quadratic x^2 + ax + b through the points (1, -1) and (2, 9).
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OpenStudy (anonymous):
Use the pair of points to set up two equations to solve for the two unknown variable a and b Think of it this way for each equation (x, y) so for (1, -1) x=1 and y = -1
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