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Matematyka z plusem 1. Podręcznik

P=a2−21​ab−21​(a−b)a−21​b(a−b)=a2−21​ab21​a2+21​ab−21​ab+21​b2=21​a2−21​ab+21​b2

(a+b)c+(a−b)c+ &nbsp;<img style="vertical-align: bottom;" src="https://prod.odrabiamy-assets.pl/uploads/content_image/image/158094/ONYDUIvMsoBH7ptP3HSCXw%3D%3D_ffa303f33830adbf4e0d83125950a36625f5754fd31b89a82138dbd817399379.png" width="24" height="25"> =0 &nbsp; ac+bc+ac−bc+

A. 4(k+3)=4⋅k+4⋅3=4k+12

−x(−2x−1)−(4x2−10x):2=−x⋅(−2x)−x⋅(−1)−(24​x2−210​x)=2x2+x−2x2+5x=6x

P1​=ah

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