options: Use polynomial identities to solve problems.

Understand and apply properties of operations and the relationship between addition and subtraction.

Represent and analyze quantitative relationships between dependent and independent variables.

Represent and solve equations and inequalities graphically.

Generate and analyze patterns.

Understand the connections between proportional relationships, lines, and linear equations.

Understand addition as putting together and adding to, and understand subtraction as taking apart and taking from.

Represent and solve problems involving multiplication and division.

Interpret the structure of expressions.

Add and subtract within 20.

Solve problems involving the four operations, and identify and explain patterns in arithmetic.

Work with equal groups of objects to gain foundations for multiplication.

Understand properties of multiplication and the relationship between multiplication and division.

Analyze and solve linear equations and pairs of simultaneous linear equations.

Create equations that describe numbers or relationships

Solve real-life and mathematical problems using numerical and algebraic expressions and equations.

Write expressions in equivalent forms to solve problems.

Perform arithmetic operations on polynomials.

Represent and solve problems involving addition and subtraction.

Use the four operations with whole numbers to solve problems.

Understand the relationship between zeros and factors of polynomials.

Reason about and solve one-variable equations and inequalities.

Rewrite rational expressions.

Work with addition and subtraction equations.

Solve equations and inequalities in one variable.

Multiply and divide within 100.

Analyze patterns and relationships.

Gain familiarity with factors and multiples.

Write and interpret numerical expressions.

Work with radicals and integer exponents.

Use properties of operations to generate equivalent expressions.

Solve systems of equations.

Understand solving equations as a process of reasoning and explain the reasoning.

Apply and extend previous understandings of arithmetic to algebraic expressions.
problem_activity: Task
Megan is working solving the equation $$\frac{2}{x^2-1} - \frac{1}{x-1} = \frac{1}{x+1}.$$ She says
If I clear the denominators I find that the only solution is $x = 1$ but when I substitute in $x = 1$ the equation does not make any sense.
Is Megan's work correct?
Why does Megan's method produce an $x$ value that does not solve the equation?


correct_option_index: 32