20. Which of the following is a possible base of a triangle whose area is (2x2 - 7x - 9) square meters? A. (2x - 9) meters B. (4x - 6) meters C. (2x + 1) meters D. (4x - 3) meters -21. Anton factored the expression 15x?y3 + 10x+y + 5xy as 5xy (3xy2 + 2x3). Did Anton factor it correctly? A. No, because 5xy is not the common factor. B. Yes, because the last term is cancelled out C. Yes, there exist a common factor on all terms D. No, because the last term when factored is 1 and should not be omitted 22. Below is the solution of Andrei in factoring 3x4 - 243: 3(x4 -81) = (x2 - 9) (x2 + 9) = (x + 3)(x - 3) Is the solution of Andrei correct? A. No, because the other factors were omitted. B. No, because it lacks 3 as its factor. C. Yes, because 3x4 - 243 is divisible by x + 3. D. Yes, because the complete factorization of the expression is (x + 3)(x - 3) - 23. The area of a rectangular garden is 9x2 - 81 square units. If one side is 3x - 9, what is the other side? A. 3x - 9 B. 3x + 9 C.X-9 D.X + 9 - 24. A Suppose you have a rectangular garden that has an area represented by 15x2 - 4x - 4 square meters, and the length measures 12 meters. If you are going to plant your garden with eggplant which is 40cm apart, how many Eeggplant can you plant? A. 768 B. 600 C. 456 D. 300 - 25. The area of a rectangular garden is (12x2 - 8x - 15)m2, what are its dimensions? A. (3x - 5)m by (4x + 3)m B. (6x + 5)m by (2x - 3)m C. (6x - 3)m by (2x - 5)m D. (12x - 15)m by (x + 1) m
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