Difference of squares and perfect square trinomials

Recognize a^2 - b^2 and a^2 + 2ab + b^2 on sight and factor them instantly.

Standards:A-SSE.A.2

Try it: three questions

Real questions from the practice bank. Tap an answer to check it.

Question 1 of 1

Simplify (3x + 5)² − (3x − 5)²

How this fits in

Difference of squares and perfect square trinomials is one skill in the Quadratic Equations unit. Students read the unit lesson, then earn a bronze, silver, or gold medal on their last 10 answers. Medals never go down. A mastered unit comes back for review after 1, 3, 7, 16, and 35 days so it stays learned.

Multiplying binomials
Factoring trinomials
Solving quadratics by factoring
The quadratic formula
Completing the square
Vertex, axis of symmetry, and graphing parabolas
The discriminant and the number of solutions
Quadratic word problems

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