Question

Выполнить:

Сократите дробь:

а)(21a^2 (b-a))/14ab(a-b)

б)(125x^2 y^3)/(15x^2 〖 y〗^4 )

в)(16a^2 (b+a))/8ab(a+b)

г)(27x^3 y)/(6x^4 〖 y〗^2 )

СРОЧНО ​

Answer 1

Объяснение:

$\frac{ {21a}^{2} (b - a)}{14ab(a - b)} = \frac{ - 7 \times 3 {a}^{2} (a - b)}{7 \times 2ab(a - b)} = - \frac{3a}{2b}$

$\frac{125 {x}^{2} {y}^{3} }{15 {x}^{2} {y}^{4} } = \frac{5 \times 25 {x}^{2} {y}^{3}}{5 \times 3 {x}^{2} {y}^{4} } = \frac{25 }{3y}$

$\frac{16 {a}^{2} (b + a)}{8ab(a + b)} = \frac{8 \times 2 {a}^{2} (a + b)}{8ab(a + b)} = \frac{2a}{b}$

$\frac{27 {x}^{3}y }{6 {x}^{4} {y}^{2} } = \frac{3 \times 9 {x}^{3}y }{3 \times 2 {x}^{4} {y}^{2} } = \frac{9}{2xy}$