4
QuizMultiple Choice

Modeling with Quadratic Equations

Question 4 • FL-1200700-Mathematics for College Algebra MIS

The product of two numbers is 240. The first number is 8 less than the second number. Which equation can be used to find x, the lesser number?

Answer
A
x(x – 8) = 240
B
x(x + 8) = 240
C
x2 – 8 = 240
D
x2 + 8 = 240

Explanation

Let x be the lesser number. Since the first number is 8 less than the second, the greater number is x + 8; their product is x(x + 8) = 240. This is choice B, “x(x + 8) = 240.”

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