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Complete the table of values for y=-x^2+5x-1 and draw the graph.
Use your graph to estimate the roots of the function to 1 d.p.
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Use your graph to estimate the roots of the function to 1 d.p.
| x | -5 | -4 | -3 | -2 | -1 | 0 | 1 | 2 | 3 | 4 | 5 |
| y | -51 | -37 | -25 | -15 |
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The roots of the function are 4.8 and 0.2
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Table of values for y=-x^2+5x-1| x | -5 | -4 | -3 | -2 | -1 | 0 | 1 | 2 | 3 | 4 | 5 |
| y | -51 | -37 | -25 | -15 | -7 | -1 | 3 | 5 | 5 | 3 | -1 |
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