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11. Which mathematical statement is correct? A. (2x - 1)(3x - 4) = 6x 5x + 4 B. (4x - 5)(4x - 5) = 16x? 40x + 25 C. (3x - 4)(2x + 7) = 6x2-3x -8 D. (2x - 5)2 = 4x2 + 20x + 25 12. The area of a square is 4x2 + 12x + 9 square units. Which expression represents the length of the side? A. (3x + 2) units C. (4x + 9) units B. (2x + 3) units D. (4x + 3) units 13. Your classmate was asked to square (2x - 3), the answered 4x2 +9. Is his answer correct? A. No, because squaring a binomial always produces a trinomial product. B. No, because the answer must be 4x2 + 9 C. Yes, because squaring a binomial always produces a binomial product. D. Yes, because the product rule is correctly applied. 14. Let A: 4x2 - 81, and let B: (2x - 9)(2x + 9). If x = 2, which statement is true about A and B? A, AB B. AB C. A= B D. A 15.The length of a box is five meters less than twice the width. The height is 4 meters more than three times the width. The box has a volume of 520 cubic meters. Which of the following equations can be used to find the height of the box? A. W(2L - 5)(3H + 4) = 520 B. W(2L + 5)(3H - 4) = 520 C. W(2W - 5)(3W - 4) = 520 D. W(2W - 5)(3W + 4) = 520
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