Math Problem Statement

Find the limit of the expression (2x - 3)^2 - (x + 1)^2 divided by x - 7 as x approaches 7.

Solution

The equation shown in the image appears to be a limit problem. Here's the expression I can read from the image:

limx7(2x3)2(x+1)2x7\lim_{{x \to 7}} \frac{(2x - 3)^2 - (x + 1)^2}{x - 7}

This looks like a classic limit problem where direct substitution may lead to an indeterminate form (like 00\frac{0}{0}), so we would need to simplify the expression using algebraic techniques, such as factoring or applying difference of squares.

Let's solve this step by step:

  1. The numerator is of the form (2x3)2(x+1)2(2x - 3)^2 - (x + 1)^2, which is a difference of squares. We can apply the identity:

[ a^2 - b^2 = (a

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Math Problem Analysis

Mathematical Concepts

Limits
Algebraic Simplification
Difference of Squares

Formulas

Difference of Squares: a^2 - b^2 = (a - b)(a + b)
Limit Definition

Theorems

Limit Laws
Algebraic Simplification

Suitable Grade Level

Grades 10-12