zad 5 przykład b i d
zad 6 przykład b i d
zadania w załączniku daje najlepsze
(4a+2b-7)-(a-3b-4)-(2a-b-3)=4a+2b-7-a+3b+4-2a+b+3=a+6b
(-5a+b-3)-(2a-3b+5)-(4a-b-8)=-5a+b-3-2a+3b-5-4a+b+8=-a+5b
3-x^2-[2-2x^2-(-3x^2-2x+1)]=3-x^2-2+2x^2-3x^2-2x+1=2x^2-2x-1
3x^2-5x-[1-3x-(2+4x-x^2)]=3x^2-5x-1+3x+2+4x-x^2=2x^2+2x+1
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(4a+2b-7)-(a-3b-4)-(2a-b-3)=4a+2b-7-a+3b+4-2a+b+3=a+6b
(-5a+b-3)-(2a-3b+5)-(4a-b-8)=-5a+b-3-2a+3b-5-4a+b+8=-a+5b
3-x^2-[2-2x^2-(-3x^2-2x+1)]=3-x^2-2+2x^2-3x^2-2x+1=2x^2-2x-1
3x^2-5x-[1-3x-(2+4x-x^2)]=3x^2-5x-1+3x+2+4x-x^2=2x^2+2x+1