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Operations with polynomials

Combinations of addition, subtraction and multiplication of polynomials (linear and quadratic). Based on TEKS [Algebra 1] standard 10 and high school CommonCore standard grade 9

2(x² + 1)² =

2x⁴ + 2 4x⁴ + 4 2x⁴ + 4x² + 2 4x⁴ + 8x² + 4
What is the square of (x + 1) + (x + 2)?

4x² + 6x + 9 2x² + 6x + 5 4x² + 9 4x² + 12x + 9
The expression (3n² + 4n + 5) – n(2n – 1) is equivalent to

n² + 3n + 5 n² + 5n + 5 n² + 4n + 4 n² + 4n + 6
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