x = ________________ x = _________________ x = _________________ 20. When solving -4x2 21x 3 = 0, what is the sum of the roots? ___________________ – – 21. The function y = -16t2 + 450 models the height in feet of a stone seconds after it is dropped from the edge y t of a vertical cliff. How long will it take the stone to hit the ground? Round to the nearest tenth. (Use a graphing calculator) ____________ secs 22. Find the missing value to complete the square. 23. Find all zeros of 2x4 5x3 + 53x2 125x + 75 = 0. – – x2 + 28x + ________ Zeros: _____________________________ 24. Write a polynomial function in standard form with zeros at 3 and 2 3i. y = ___________________________ – 25. If = find the following f(x) Evaluate the following: 27. log9 = x 28. Log81 x = 29. log2 (x2 + 8) = log2 (x) + log2 6 x = _______________ x = _______________ x = _______________
x = ________________ x = _________________ x = _________________ 20. When solving -4x2 – 21x – 3 = 0, what is the sum of the roots? ___________________ 21. The function y = -16t2 + 450 models the height y in feet of a stone t seconds after it is dropped from the edge of a vertical cliff. How long will it take the stone to hit the ground? Round to the nearest tenth. (Use a graphing calculator) ____________ secs 22. Find the missing value to complete the square. 23. Find all zeros of 2x4 – 5x3 + 53x2 – 125x + 75 = 0. x2 + 28x + ________ Zeros: _____________________________ 24. Write a polynomial function in standard form with zeros at 3 and 2 – 3i. y = ___________________________ 25. If f(x) = find the following Evaluate the following: 27. log9 = x 28. Log81 x = 29. log2 (x2 + 8) = log2 (x) + log2 6 x = _______________ x = _______________ x = _______________
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