Rewrite Expressions — Factoring and Expanding

Rewriting expressions — like 0.1y + 0.1(5 + y) as 0.2y + 0.5 — reveals equivalent forms for easier solving.

Grade 7Common Core 7.EE.A.2EEVerified correct ✓

Worked examples

Expand: (3x + 1)(3x - 1)
Answer: 9*x**2 - 1

Expand: (x + 5)(x - 5)
Answer: x**2 - 25

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