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What is the value of (x - 4)(x + 4)?
What is the value of (x - 4)(x + 4)?
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Practice Questions
1 question
Q1
What is the value of (x - 4)(x + 4)?
x² - 16
x² + 16
x² - 8
x² + 8
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(x - 4)(x + 4) = x² - 16.
Questions & Step-by-step Solutions
1 item
Q
Q: What is the value of (x - 4)(x + 4)?
Solution:
(x - 4)(x + 4) = x² - 16.
Steps: 6
Show Steps
Step 1: Identify the expression you need to simplify, which is (x - 4)(x + 4).
Step 2: Recognize that this expression is in the form of a difference of squares, which is a special formula: (a - b)(a + b) = a² - b².
Step 3: In our case, a is x and b is 4. So, we can rewrite the expression using the formula.
Step 4: Apply the formula: (x - 4)(x + 4) becomes x² - 4².
Step 5: Calculate 4², which is 16.
Step 6: Substitute back into the expression: x² - 16.
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