Question

Выполните действие .30 БАЛОВ ПЖ​

Answer 1

1)  ((u²-4u+16)(4u+1)*u) / ((4u-1)(4u+1)(u+4)(u²-4u+16))=

   u/(4u-1)(u+4).   Сумма кубов, квадрат разности.

2) u²/((4u-1)(u+4)*u) - (u+4)²/((4u-1)*u*(u+4))=

   (u² - (u+4)²)/(u(u+4)(4u-1))=

   (u-u-4)(u+u+4) / (u(u+4)(4u-1))=

   -8(u+2) / (u(u+4)(4u-1))

3) -8(u+2)*u(u+4) / (5u(u+4)(4u-1))=-8(u+2) / (5(4u-1))

4) -8(u+2) / (5(4u-1)) + (20u+13)/(5(4u-1))=

(-8u-16+20u+13) / (5(4u-1))=

(12u-3) / (5(4u-1))=3(4u-1) / (5(4u-1))=3/5=0,6.