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use the equation { x2 + x - 5 = 0 7)What is the LCD of the coefficients? A. 2 B. 3 C. 4 D. 6 8) What is the general form (Dx2 + bx + c = 0) of the equation with integral coefficients? A. 2x2 + 3x - 5 = 0 C. 4x2 + 9x - 30 = 0 B. 4x2 + 9x - 5 = 0 D. 6.12 + 6x - 30 = 0 9) What are the roots of x + * - 13 = 0? A 9 and 4 B. -9 and - 4 C. 9 and - 4 D-9 and 4 10) A rectangular children's swimming pool has an area of 126 square meters and a perimeter of 46 meters. What is its length and width? A. 6 and 21 B.14 and 9 C. 63 and 2 D. 12 and 10 11) A 3cm by 3cm square piece of cardboard was cut from a bigger s square cardboard. the area of the remaining cardboard was 40cm square. is it represents the side of the bigget cardboard, which of the ff., expression gives the area of the remaining piece? A. s² + 40 B. s² - 9 C. s² + 9 D s² - 40
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