Question

A²-81/8a²+72a при a=1​

Answer 1

Ответ:

Объяснение:

$\frac{a^2-81}{8a^2+72a}=\frac{(a-9)(a+9)}{8a(a+9)}=\frac{a-9}{8a}\\a=1\\\frac{1-9}{8}=-1$

Answer 2

To find the value of the expression A² - (81/8)a² + 72a when a = 1, you simply substitute a with 1 and perform the calculations.

Let's substitute a = 1 into the expression:

A² - (81/8)(1)² + 72(1)

Now, perform the calculations:

A² - (81/8) + 72

To simplify further, we need to know the value of A, as it's currently an unknown variable in the expression. If you have a specific value for A, you can substitute it to get the final result. Otherwise, the expression cannot be evaluated without knowing the value of A.