August 2022 1 0 Report

преобразуйте в многочлен.исправьте если что то неверно(только можно подробнее)

а)(2a-3b)(2a+3b)-3a^2=4a^2+6ab-6ab-9b^2=4a^2-9ab ????????

б)(3y+4z)^2-8z(3y-2z)=9y^2+16x^2-24xy+16x^2=9y^2-24xy+32x^2 ??????

в)(c^2+4d)(c^4-4c^2d+16d^2)-c^2(c^4-1)=(c^6-4c4d+16c^2d^2+4c^2d^2+64d^3)-c^2(c^4-1)=c^6+64d^3-c^6+c^2=64d^3+c^2????????????????????

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