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2. =5x4+5x2-(x4+3x2-2x2-6)=x4+4x2+6
3. =4(4a2+8ab-2ab-4b2)-(9ab-6a2+6b2-4ab)=16a2+32ab-8ab-16b2-9ab+6a2-6b2+4ab=22a2+19ab-22b2
4. =4p2+8pr-3pr-6r2-(3p2+18pr-pr-6r2)=4p2+8pr-3pr-6r2-3p2-18pr+pr+6r2=p2-12pr
jezeli po a,x,b,p lub r jest liczba to jest ona potega
2. 5x²(x²+1)-(x₂-2)(x₂+3)= 5x⁴+5x² -x⁴+3x²- 2x²-6 = 4x³+6x²-6
3. 4(2a-b)(2a+4b)-(3a-2b)(3b-2a) = 4* 4a²+8ab - 2ab - ab²=4*4a²+6ab-ab²
4. (4p-3r)(p+2r)-(3p-r)(p+6r)= 4p²+8pr-3pr-6r² = 4p²+6pr-6r²