Question the-pr
The product of two positive integers is . If the first integer is greater than twice the second integer, what is the smaller of the two integers?
The product of two positive integers is 546 . If the first integer is 11 greater
Hard-difficulty · SAT Math · Nonlinear Equations in One Variable — Quadratic solving (factoring, quadratic formula, completing square). Read the question above, select your answer, and check the full explanation below to understand exactly why the correct choice works.
Answer explanation
Choice B is correct. Let be the first integer and let be the second integer. If the first integer is greater than twice the second integer, then . If the product of the two integers is , then . Substituting for in this equation results in . Distributing the to both terms in the parentheses results in . Subtracting from both sides of this equation results in . The left-hand side of this equation can be factored by finding two values whose product is , or , and whose sum is . The two values whose product is and whose sum is are and . Thus, the equation can be rewritten as , which is equivalent to , or . By the zero product property, it follows that and . Subtracting from both sides of the equation yields . Dividing both sides of this equation by yields . Since is a positive integer, the value of is not . Adding to both sides of the equation yields . Substituting for in the equation yields . Dividing both sides of this equation by results in . Therefore, the two integers are and , so the smaller of the two integers is .
Choice A is incorrect and may result from conceptual or calculation errors.
Choice C is incorrect. This is the larger of the two integers.
Choice D is incorrect and may result from conceptual or calculation errors.
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