\[\boxed{\text{292\ (292).}\text{\ }\text{Еуроки\ -\ ДЗ\ без\ мороки}}\]
Пояснение.
Решение.
\[1) - 5a^{4} + 3a^{2} - a + 8\]
\[- 5a^{4},\ \ \ 3a^{2},\ \ \ - a,\ \ \ 8\]
\[2)\ 6x^{3} - 10x^{2}y + 7xy^{2} + y^{3}\]
\[6x^{3},\ \ \ - 10x^{2}y,\ \ \ 7xy^{2},\ \ \ y^{3}\]
\[3)\ t^{3} + 3t^{2} - 4t + 5\]
\[t^{3},\ \ \ 3t^{2},\ \ \ - 4t,\ \ \ 5\ \]
\[4)\ 1,8a^{3}b - 3,7a^{2}b^{2} + 16ab^{3} - b^{4}\]
\[1,8a^{3}b,\ \ \ - 3,7a^{2}b^{2},\ \ \ 16ab^{3},\ \ \ - b^{4}\]
\[\boxed{\text{293\ (293).}\text{\ }\text{Еуроки\ -\ ДЗ\ без\ мороки}}\]
Пояснение.
Решение.
\[1)\ 2x^{2} + x - 3\ \ \]
\[при\ x = 0,5:\]
\[2 \cdot 0{,5}^{2} + 0,5 - 3 =\]
\[= 0,5 \cdot (2 \cdot 0,5 + 1) - 3 =\]
\[= 0,5 \cdot 2 - 3 = - 2.\]
\[2)\ x^{3} + 5xy:\]
\[при\ x = 3;\ \ y = - 2:\]
\[3^{3} - 5 \cdot 3 \cdot 2 = 27 - 30 = - 3.\]
\[3)\ a^{2} - 2ab + b^{2}\]
\[при\ a = - 4;\ \ b = 6:\]
\[(a - b)^{2} = ( - 4 - 6)^{2} =\]
\[= ( - {10)}^{2} = 100.\]
\[4)\ y^{4} + 7y^{3} - 2y^{2} - y + 10\ \]
\[при\ y = - 1:\]
\[= 1 - 7 - 2 + 1 + 10 = 3.\]