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Choose the best answer for each. Which equation is illustrated by x = -3 ±√9 - 4(2)(5) 2x2 - 3x = 5 -3x2 - 5x + 3 = 0 2x2 + 3x - 5 = 0 2x2 + 3x = -5 4 ? Which equation is illustrated by x = 7 ±√49 - 4(1)(2) 7x2 + x + 2 = 0 x2 - 7x - 2 = 0 x2 - 7x + 2 = 0 x2 + 7x = 2 2 ? Which equation is illustrated by x = 2 ±√4 - 4(3)(8) 3x2 - 2x = -8 2x2 + 3x + 8 = 0 3x2+ 8x + 3 = 0 6x2 - 2x = 8 6 ? What is the equation of the axis of symmetry for 2x2 - 8x = 0 ? x = -2 x = 2 -4 x = 4 What is the equation of the axis of symmetry for x2 + 4 = 0 ? x = 0 x = -2 x = 4 x = -4 What is the vertex for (-4, 5) (2, 0) (2, 1) x = 2 x2 - 4x + 5 = 0 ? What is the vertex for 3x2 - 12x + 1 = 0 (2, -11) (2, 13) (-2, 37) x = 2 What is the vertex for x2 - 6x = 3 ? (3, 6) (3, 0) (3, -12) x = 3 Using the discriminant,how many solutions are there for 2 1 0 Cannot be determined x2 - 6x + 9 = 0 ? Using the discriminant,how many solutions are there for 2 1 0 Cannot be determined x2 - 9 = 0 ? Using the discriminant,how many solutions are there for 2 0 1 Cannot be determined x2 + 1 = 0 ? What is the vertex? (-2, 9) (2, -9) (-1, -9) (-2, -9) What are the solutions? -4 and 1 -5 and -4 5 and -1 -5 and 1 Which function matches the graph? y = x2 - 1 y = x2 + 2x - 1 y = 2x2 - 4x - 1 y = x2 - 2x - 1 What number needs to be added to the following to complete the square? x2 + 8x + n 8 -8 16 32 What number needs to be added to the following to complete the square? x2 - 10x + n -25 25 -50 50 |