Question

(а-5)во2+(а+7)(5-а)+8а

Answer 1

=а²-10а+25+5а-а²+35-7а+8а=-4а+60=-4(а-15)

Answer 2

смотри решение на фото

Answer 3

To simplify the expression (а-5)во2 + (а+7)(5-а) + 8а, you should follow the order of operations (PEMDAS/BODMAS) which stands for Parentheses, Exponents, Multiplication/Division, and Addition/Subtraction.

1. Simplify within parentheses: (a+7)(5-a) = 5(a) - a(a) + 7(5) - 7(a) = 5a - a^2 + 35 - 7a

2. Expand the expression: (a-5)во2 + 5a - a^2 + 35 - 7a + 8a

3. Combine like terms: (a-5)во2 + 6a - a^2 + 35

So, the simplified expression is: (a-5)во2 + 6a - a^2 + 35