\[\boxed{\text{847\ (847).\ }\text{Еуроки\ -\ ДЗ\ без\ мороки}}\]
\[\frac{3,2}{9,6} = \frac{1}{3},\ \ y = 3x,\ \ x = \frac{y}{3}\]
\[x\] | \[0,3\] | \[8\] | \[3,2\] | \[0,9\] | \[14\] |
---|---|---|---|---|---|
\[y\] | \[0,9\] | \[24\] | \[9,6\] | \[2,7\] | \[42\] |
\[\boxed{\text{847.\ }\text{Еуроки\ -\ ДЗ\ без\ мороки}}\]
\[1)\ 8x² + 16\text{xy} + 8y² =\]
\[= 8 \cdot \left( x^{2} + 2\text{xy} + y^{2} \right) =\]
\[= 8 \cdot (x + y)²\]
\[2) - 2a^{2} + 24\text{ab} - 72b^{2} =\]
\[= - 2 \cdot \left( a^{2} - 12ab + 36b^{2} \right) =\]
\[= - 2 \cdot (a - 6b)²\]
\[3) - 12b^{3} - 12b^{2} - 3b =\]
\[= - 3b\left( 4b^{2} + 4b + 1 \right) =\]
\[= - 3b(2b + 1)²\]
\[4)\ 48m³n - 72m^{2}n + 27mn =\]
\[= 3mn\left( 16m^{2} - 24m + 9 \right) =\]
\[= 3mn(4m - 3)²\]