PSAT Math Multiple-Choice Question 252: Answer and Explanation
Question: 252
(2xy -1)(3xy -2) Multiply.
- A. 6x2y2 + xy + 2
- B. 6x2y2-xy + 2
- C. 6x2y2 + 7xy + 2
- D. 6x2y2-7xy + 2
Correct Answer: D
Explanation:
The correct solution is 6 x2 y2 -7xy + 2.
(2xy - 1)(3xy - 2) = (2xy)(3xy - 2) - 1(3xy - 2) = 6 x2 y2 - 4xy - 3xy + 2 = 6 x2 y2 - 7xy + 2
See Lesson: Powers, Exponents, Roots, and Radicals.
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