Преобразуйте выражение в многочлен.

Решите задачу:

$2) (0.3a^2+4b)^2=(0.3a^2+4b)(0.3a^2+4b)= \\ =0.09a^4+1.2a^2b+1.2a^2b+16b^2=0.09a^4+2.4a^2b+16b^2$

$3) (0.2m^2-5n)^2=(0.2m^2-5n)(0.2m^2-5n)= \\ =0.04m^4-m^2n-m^2n+25n^2=0.04m^4-2m^2n+25n^2$

$4) (1.3p^3+2.5p^2)^2=(1.3p^3+2.5p^2)(1.3p^3+2.5p^2)= \\ =1.69p^6+3.25p^5+3.25p^5+6.25p^4=1.69p^6+6.5p^5+6.25p^4$

$5) (2.4c^3-1.5d^2)^2=(2.4c^3-1.5d^2)(2.4c^3-1.5d^2)= \\ =5,76c^6-3,6c^3d^2-3,6c^3d^2+2,25d^4=5,76c^6-7.2c^3d^2+2,25d^4$

$6) (7x^2y+3xy^2)^2=(7x^2y+3xy^2)(7x^2y+3xy^2)= \\ =49x^4y^2+21x^3y^3+21x^3y^3+9x^2y^4=49x^4y^2+42x^3y^3+9x^2y^4$