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If the sum of two numbers is 20 and their product is 96, what are the two number
Practice Questions
Q1
If the sum of two numbers is 20 and their product is 96, what are the two numbers?
12 and 8
10 and 10
16 and 4
14 and 6
Questions & Step-by-Step Solutions
If the sum of two numbers is 20 and their product is 96, what are the two numbers?
Steps
Concepts
Step 1: Let the two numbers be x and y.
Step 2: Write down the equations based on the problem: x + y = 20 (for the sum) and x * y = 96 (for the product).
Step 3: From the first equation, express y in terms of x: y = 20 - x.
Step 4: Substitute y in the second equation: x * (20 - x) = 96.
Step 5: Expand the equation: 20x - x^2 = 96.
Step 6: Rearrange the equation to form a standard quadratic equation: x^2 - 20x + 96 = 0.
Step 7: Factor the quadratic equation: (x - 12)(x - 8) = 0.
Step 8: Solve for x: x = 12 or x = 8.
Step 9: Find y using y = 20 - x: If x = 12, then y = 8; if x = 8, then y = 12.
Step 10: The two numbers are 12 and 8.
No concepts available.
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