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(5x + 3y) ² = (5x) ² + 2*5x*3y + (3y)² = 25 x ² + 30xy + 9y ²
(2a + 4b)₂ = (2a) ² + 2* 2a * 4b + (4b)² = 4a² + 16ab + 16b²
(2x ² + 4xy) ² = (2x²)² + 2* 2x²* 4xy + (4xy)² = 4x⁴ + 16 x³y + 16 x² y ²
(5x + 3y)² = 25x² + 2*5x*3y + 9y² = 25x² + 30xy + 9y²
(2a + 4b)² = 4a² + 2*2a*4b + 16b² = 4a² + 16ab + 16b²
(2x² + 4xy)² = 4x^4 + 2*2x²*4xy + 16x²y² = 4x^4 + 16x³y + 16x²y²
^4 -> do potęgi 4