Digital SAT Math
Lesson Plan
Solving rational equations (extraneous solutions)
Goals / Objectives
Solve a rational equation by writing its excluded values first, multiplying every term by the LCD, and rejecting any candidate on the exclusion list, reporting no solution when every candidate is excluded
Find every excluded value by setting each denominator to zero, factoring first where needed
Solve a proportion by cross-multiplication, and explain it as the LCD step in one line
Distinguish the contradiction, identity and excluded-candidate outcomes after clearing denominators
Solve a formula containing the target variable in a denominator
Standards
"Make strategic use of algebraic structure, the properties of operations, and/or reasoning about equality to solve: • linear absolute value equations in one variable or simple rational and radical equations in one variable." "Given an equation or formula in two or more variables, view it as an equation in a single variable of interest where the other variables are parameters, and solve for the variable of interest."
Academic Vocabulary
Not in our source material
Materials
No slides or practice set for this standard yet
Remediation
Enrichment
This lesson’s brief has no Differentiation
Accommodations
Not in our source material
Anticipatory Set / Bell Work
This lesson’s brief has no Suggested Activities
Modeling
Check for Understanding
This lesson’s brief has no Formative Assessment or Assessment Ideas
Guided Practice
No slides or practice set for this standard yet
Independent Practice
No slides or practice set for this standard yet
Homework
Pacing
This lesson’s brief has no Pacing