Question

Запишите в виде многочлена следующие выражения
(0,1x-0,2y)^2
(0,4a+0,5b)^2
(-3x+6y)^2
(7a-b)^2
(-a-8b)^2
(x-9y)^2

Answer 1

$1)(0.1x - 0.2y) {}^{2} \\ ( \frac{1}{10} x - \frac{1}{5} y) {}^{2} \\ \\ \frac{1}{100} x { }^{2} - \frac{1}{25} xy + \frac{1}{25} y {}^{2}$
$1)(0.1x - 0.2y) {}^{2} \\ ( \frac{1}{10} x - \frac{1}{5} y) {}^{2} \\ \\ \frac{1}{100} x { }^{2} - \frac{1}{25} xy + \frac{1}{25} y {}^{2} \\ \\ 2)(0.4a + 0.5b) {}^{2} \\ \\ ( \frac{2}{5} a + \frac{1}{2} b) \\ \\ \frac{4}{25} a {}^{2} + \frac{2}{5} ab + \frac{1}{4} b {}^{2} \\ \\ 3)( - 3x + 6y) {}^{2} \\ ( 6y - 3x) {}^{2} \\ (6y) {}^{2} - 2 \times 6y \times 3x + (3x) {}^{2} \\ 36y {}^{2} - 36xy + 9x {}^{2} \\ \\ 4)(7a - b) {}^{2} \\ (7a) {}^{2} - 2 \times 7ab + b {}^{2} \\ 49a {}^{2} - 14ab + b {}^{2} \\ \\ 5)( - a - 8b) {}^{2} \\ ( - a) {}^{2} + 16ab + 64b {}^{2} \\ a {}^{2} + 16ab + 64b {}^{2} \\ \\ 6) (x - 9y) {}^{2} \\ x {}^{2} - 2x \times 9y + (9y) {}^{2} \\ x {}^{2} - 18xy + 81y {}^{2}$