Question: 18. Factor the polynomial completely: 5x2 + 35x - 150 19. Factor the polynomial completely: 25x2 - 49 20. Simplify the radical: V40x5 y8 21.

18. Factor the polynomial completely: 5x2 + 35x - 150 19. Factor the polynomial completely: 25x2 - 49 20. Simplify the radical: V40x5 y8 21. Simplify the radical: 125x9 y 12 For #22-25, Solve each quadratic equation. You may use any method you prefer. 22. x2 + 12x - 28 = 0 23. x2 + 6x =-10 24. 3x2 - 11x - 4 =0 25. (x + 5)2 = 10

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