Question

А) (15y²+7y)-(13y-5y²). б) 2c(a-3b+4) помогите пж

Answer 1

А) 15y²+7y-13y+5y²= 20y²-6у=2у(10у-3)

б) 2c(a-3b+4)=2ас-6bc+8c

Answer 2

А) (15y²+7y)-(13y-5y²). 
15y²+7у-13у+5y²= 20y²-6у
б) 2c(a-3b+4)
2ас-6bc+8с

Answer 3

Sure, I'd be happy to help you with these algebraic expressions!

a) To simplify the expression (15y² + 7y) - (13y - 5y²), follow these steps:

Step 1: Distribute the negative sign (which is like multiplying by -1) to the terms inside the second parentheses: (15y² + 7y) - 13y + 5y²

Step 2: Combine like terms (terms with the same variable and exponent): 15y² + 5y² + 7y - 13y

Step 3: Perform addition and subtraction of like terms: (15y² + 5y²) = 20y² (7y - 13y) = -6y

So, the simplified expression is: 20y² - 6y

b) To simplify the expression 2c(a - 3b + 4), follow the distributive property:

Step 1: Multiply 2c by each term inside the parentheses: 2c * a - 2c * 3b + 2c * 4

Step 2: Simplify each term: 2ca - 6cb + 8c

So, the simplified expression is: 2ca - 6cb + 8c

If you have any more questions or need further assistance, feel free to ask!