Question

(2a+1)(2a-1)+(a-7)(a+7)

Answer 1

Объяснение:

4a^2-1+a^2-49=3a^2-50

Answer 2

(2a+1)(2a-1)+(a-7)(a+7)
(4a(в 2 степени)+1)+(а(в 2 степени)-49)
4а”+1+а”-49
4а”-а”-49+1
4-48=-44

Answer 3

To simplify the expression, let's expand it step by step:

(2a + 1)(2a - 1) + (a - 7)(a + 7)

Expanding the first term: (2a)(2a) + (2a)(-1) + (1)(2a) + (1)(-1)

Simplifying: 4a^2 - 2a + 2a - 1

Combining like terms: 4a^2 - 1

Now let's expand the second term: (a)(a) + (a)(7) + (-7)(a) + (-7)(7)

Simplifying: a^2 + 7a - 7a - 49

Combining like terms: a^2 - 49

Now we can combine both simplified terms: 4a^2 - 1 + a^2 - 49

Combining like terms: 4a^2 + a^2 - 1 - 49

Simplifying: 5a^2 - 50

So, the simplified expression is 5a^2 - 50.