Question

3(2a+5b)-7(4a-3b)+2(5a-9b)?

Answer 1

Пошаговое объяснение:

3(2а+5b)-7(4a-3b)+2(5a-9b)=6a+15b-28a+21b+10a-18b=(6a-28a+10a)+(15b21b-18b)=18b-12a

Answer 2

To simplify the expression 3(2a+5b) - 7(4a-3b) + 2(5a-9b), follow the order of operations (PEMDAS: Parentheses, Exponents, Multiplication and Division, Addition and Subtraction). Distribute the coefficients outside the parentheses and then combine like terms:

1. Distribute the coefficients: = 3 * 2a + 3 * 5b - 7 * 4a + 7 * 3b + 2 * 5a - 2 * 9b

2. Perform the multiplications: = 6a + 15b - 28a + 21b + 10a - 18b

3. Combine like terms: = (6a - 28a + 10a) + (15b + 21b - 18b) = -12a + 18b

So, the simplified expression is: -12a + 18b.