Question

o valor de 5a⁴+6a²-3a² b-3b
______________
10a²
para a= 9
b=7
​

Answer 1

Vamos là.

( 5a⁴ + 6a² - 3a²b - 3b ) / (10a²) ,

a = 9, b = 7

( 5*9⁴ + 6*9² - 3*9²*7 - 3*7 ) / (10*9²) =

( 32805 + 486 - 1701 - 21) / 810 =

31569/810 = 10523/270