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Unit 8: Name the unknown

Naming the unknown and linear equations

Read this before the quizzes

Name the unknown first

Linear equations: undo in reverse

Words into equations

Translate and solve

Collect the terms

Answer the question asked

Answers and why: naming and linear equations

Two unknowns and identities

Elimination

Substitution and identities

Square of a difference

Answers and why: two unknowns and identities

Quadratics and roots

Factor, then test every root

Sum and product of roots

Perfect squares and real roots

Factor

Sum and product

Repeated root

Answers and why: quadratics and roots

Inequalities and absolute value

Inequalities: the sign flips at a negative

Absolute value: two cases

Flip the sign

Two cases

Answers and why: inequalities and absolute value

Sequences, slips and formula cards

Arithmetic and geometric sequences

Ten slips to watch for

The formula cards

Your pace for this unit

Mission: one translation a day

Sequence term

Geometric

Answers and why: sequences

Self-check: can you do it?

Algebra. This unit has one move: name the unknown.

Quantitative Aptitude Unit 8: Algebra

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