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а) ( 11 c 2 + a 2 ) ( − a 3 + 11 c 2 ) {\displaystyle \left(11c^{2}+a^{2}\right)\left(-a^{3}+11c^{2}\right)} б) ( 0 , 8 x + y 4 ) ( − 0 , 8 x − y 4 ) {\displaystyle \left(0,8x+y^{4}\right)\left(-0,8x-y^{4}\right)} в) ( 0 , 3 c − 0 , 2 d ) ( 0 , 2 d − 0 , 3 c ) {\displaystyle (0,3c-0,2d)(0,2d-0,3c)} г) ( 6 x 3 − 4 x ) ( − 6 x 3 − 4 x ) {\displaystyle \left(6x^{3}-4x\right)\left(-6x^{3}-4x\right)}
а) ( 11 c 2 + a 3 ) ( − a 3 + 11 c 2 ) = ( 11 c 2 − a 3 ) ( 11 c 2 + a 3 ) = 121 c 4 − a 6 {\displaystyle \left(11c^{2}+a^{3}\right)\left(-a^{3}+11c^{2}\right)=\left(11c^{2}-a^{3}\right)\left(11c^{2}+\right.a^{3})=121c^{4}-a^{6}} б) ( 0 , 8 x + y 4 ) ( − 0 , 8 x − y 4 ) = − ( 0 , 8 x + y 4 ) ( 0 , 8 x + y 4 ) = − 0 , 64 x 2 − 1 , 6 x y 4 − y 8 {\displaystyle \left(0,8x+y^{4}\right)\left(-0,8x-y^{4}\right)=-\left(0,8x+y^{4}\right)\left(0,8x+y^{4}\right)=-0,64x^{2}-1,6xy^{4}-y^{8}} в) ( 0 , 3 c − 0 , 2 d ) ( 0 , 2 d − 0 , 3 c ) = − ( 0 , 3 c − 0 , 2 d ) ( 0 , 3 c − 0 , 2 d ) = − 0 , 09 c 2 + 0 , 12 c d − 0 , 04 d 2 {\displaystyle (0,3c-0,2d)(0,2d-0,3c)=-(0,3c-0,2d)(0,3c-0,2d)=-0,09c^{2}+0,12cd-0,04d^{2}} г) ( 6 x 3 − 4 x ) ( − 6 x 3 − 4 x ) = ( 4 x − 6 x 3 ) ( 4 x + 6 x 3 ) = 16 x 2 − 36 x 6 {\displaystyle \left(6x^{3}-\right.4x)\left(-6x^{3}-4x\right)=\left(4x-6x^{3}\right)\left(4x+6x^{3}\right)=16x^{2}-36x^{6}}