Question

( 8 - а ) ( 78 + а ).

Answer 1

Ответ: 624-70*а-а^2.

Объяснение:

Answer 2

(8-а)(78+а)

8(78+а)-а(78+а)

624+8а-78а-а²

624-70а-а²

-а²-70а+624

Answer 3

To expand the expression (8 - a)(78 + a), you can use the distributive property, also known as FOIL (First, Outer, Inner, Last). Here's how you can expand it step by step:

(8 - a)(78 + a)

First: Multiply the first terms in each set of parentheses. 8 * 78 = 624

Outer: Multiply the outer terms. 8 * a = 8a

Inner: Multiply the inner terms.

• a * 78 = -78a

Last: Multiply the last terms in each set of parentheses.

• a * a = -a^2

Now, combine all these results:

624 + 8a - 78a - a^2

Now, simplify further:

Combine the like terms (-78a and 8a): 624 - 70a - a^2

So, the expanded expression is:

• a^2 - 70a + 624