II gimnazjum

Matematyka wokół nas 2

a)−3ab⋅(−6a2−2ab−b2)−(3ab3+6a2b2)=18a3b+6a2b2+3ab3−3ab3−6a2b2=18a3b

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2x(3y−z+3x)+3x(−2x−z−2y)=6xy−2xz+6x2−6x2−3xz−6xy=−5xz

Czwarta częsˊcˊ wyraz˙enia, zatem cˊwiercˊ wyraz˙enia: 41​⋅8a(a2−ab)=2a(a2−ab)

Jedna przekątna: 10a Druga:

Cena dwoˊch tulipanoˊw: 2⋅(x+6)

Długosˊcˊ pierwszego boku: 15a &nbsp; Długosˊcˊ drugiego boku:

Figurę można podzielić na trzy prostokąty, pole figury to suma pól tych prostokątów.&nbsp; &nbsp;<img src="https://prod.odrabiamy-assets.pl/uploads/content_image/image/27068/I5lv4Sv9akFtzq%2B4%2BcblDA%3D%3D_5ca7859700e04e4cb6c01c58ceb4460be13ffe44b0ac1fe307d9f9d2c17ac2f6.jpg"> &nbsp; PI​=2,2x &nbsp; PII​=x(5,1+x)=5,1x+x2

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