 # 1) solve by using the perfect squares method. x2 + 8x + 16 = 0 2) solve. x2 – 5x – 6 = 0 3) what value should be added to the expression to create a perfect square? x2 – 20x 4) solve. x2 + 8x – 8 = 0 5) solve: 2x2 + 12x = 0 6) solve each problem by using the quadratic formula. write solutions in simplest radical form. 2x2 – 2x – 1 = 0 7) calculate the discriminant. x2 – x + 2 = 0 8) calculate the discriminant and use it to determine how many real-number roots the equation has. 3x2 – 6x + 1 = 0 9) without drawing the graph of the equation, determine how many points the parabola has in common with the x-axis and whether its vertex lies above, on, or below the x-axis. y = 2x2 + x – 3 10) without drawing the graph of the equation, determine how many points the parabola has in common with the x-axis and whether its vertex lies above, on, or below the x-axis. y = x2 – 12x + 12   ### Another question on Mathematics Mathematics, 21.06.2019 13:30
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The position of a moving particle is given by the position function: f(t)=-9t-t^2-0.2t^3+0.1t^4 a. at what time does the particle reverse direction? b. when is the displacement positive? (round one decimal place and answer in interval notation) c. when is the displacement negative? (round one decimal place and answer in interval notation) d. when is the particle’s acceleration positive? (round one decimal place and answer in interval notation) e. when is the particle’s acceleration negative? (round one decimal place and answer in interval notation)
1) solve by using the perfect squares method. x2 + 8x + 16 = 0
2) solve. x2 – 5x – 6 = 0
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