Question

(4а-1) (4а+1) + (9+а) (а-9 )

Answer 1

Ответ:

Объяснение:

(4а-1) (4а+1) + (9+а) (а-9 )=16а^2-1-81+а^2=17а^2-82

Answer 2

Ответ:

Объяснение:

(4а-1) (4а+1) + (9+а) (а-9 ) = 16a² - 1 + a² - 81 = 17a² - 82

Answer 3

To simplify the expression (4a-1)(4a+1) + (9+a)(a-9), you can use the distributive property (FOIL) and then combine like terms:

(4a-1)(4a+1) + (9+a)(a-9)

First, expand the first part using FOIL (First, Outer, Inner, Last):

(4a * 4a) + (4a * 1) + (-1 * 4a) + (-1 * 1)

Simplify the above expression:

16a^2 + 4a - 4a - 1

Now, expand the second part using FOIL:

(9 * a) + (9 * -9) + (a * a) + (a * -9)

Simplify the above expression:

9a - 81 + a^2 - 9a

Now, you can combine like terms in the entire expression:

(16a^2 + 4a - 4a - 1) + (9a - 81 + a^2 - 9a)

Combine like terms:

16a^2 + 0a - 1 - 81 + a^2 - 9a

Combine further:

(16a^2 + a^2) + (0a - 9a) - 1 - 81

Combine like terms again:

17a^2 - 9a - 1 - 81

Finally, combine the constants:

17a^2 - 9a - 82

So, the simplified expression is:

17a^2 - 9a - 82