Math Problem Statement

Evaluate the expression short dash 2 left parenthesis x minus 4 right parenthesis squared plus 11 when x equals 1.Evaluate the expression short dash 2 left parenthesis x minus 4 right parenthesis squared plus 11 when x equals 1.

Solution

Let's evaluate the expression 2(x4)2+11-2(x - 4)^2 + 11 when x=1x = 1.

Step-by-Step Solution:

  1. Substitute x=1x = 1 into the expression: 2(14)2+11-2(1 - 4)^2 + 11
  2. Simplify inside the parentheses: 14=31 - 4 = -3 So, the expression becomes: 2(3)2+11-2(-3)^2 + 11
  3. Square the result: (3)2=9(-3)^2 = 9 Now, the expression is: 2(9)+11-2(9) + 11
  4. Multiply: 2×9=18-2 \times 9 = -18 So the expression becomes: 18+11-18 + 11
  5. Add the numbers: 18+11=7-18 + 11 = -7

Thus, the value of the expression when x=1x = 1 is 7\boxed{-7}.


Would you like a more detailed explanation of any step, or do you have further questions on this topic?

Follow-up Questions:

  1. How would the value of the expression change if x=2x = 2?
  2. Can you explain how squaring a negative number affects the outcome?
  3. What is the effect of multiplying the squared term by a negative number?
  4. How do parentheses influence the order of operations in expressions like this?
  5. What would happen if the expression was written as 2x2+11-2x^2 + 11?

Tip: Always remember to follow the correct order of operations (PEMDAS/BODMAS) when simplifying mathematical expressions!

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Math Problem Analysis

Mathematical Concepts

Algebra
Quadratic Expressions
Substitution

Formulas

Expression evaluation formula
(x - a)^2

Theorems

Order of operations (PEMDAS/BODMAS)

Suitable Grade Level

Grades 7-9