Question

(b-3)(b+5)+(b-4)(b+7) упростите выражение!

Answer 1

Ответ:

2b^2+5b-43

Объяснение:

=b^2+5b-3b-15+b^2+7b-4b-28=2b^2+5b-43

Answer 2

Відповідь:

Пояснення:

(b-3)(b+5)+(b-4)(b+7)=b^{2} +5b-3b-15+ b^{2}+7b-7b-28=2b^{2} +5b-43

Answer 3

To simplify the expression, let's first expand the terms:

1. (b - 3)(b + 5) = b^2 + 5b - 3b - 15 = b^2 + 2b - 15
2. (b - 4)(b + 7) = b^2 + 7b - 4b - 28 = b^2 + 3b - 28

Now, let's combine the expanded terms:

(b^2 + 2b - 15) + (b^2 + 3b - 28)

To simplify further, combine like terms by adding the coefficients of the same powers of b:

b^2 + b^2 + 2b + 3b - 15 - 28

Now, combine constants:

2b^2 + 5b - 43

The simplified expression is:

2b^2 + 5b - 43