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17. Give the quadraticformula. trou must know this formua e X 18. Multiply: x-7) (x +h)2 19. Factor completely: 12x3 +30x2-42x 3x-48 20. Solve: 3 -54-9x x- 21. Using transformations, sketch the graph of y -3x +21-1 22. Write each in non-radical, non-rational form

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