Question

(a+3)7 a(a+b) (x-y)10 (a+b-c)2 a(x-y) (a-b)(-6)

Answer 1

1). 7a+21
2) a^2+ab
3) 10x-10y
4)2a+2b-2c
5)ax-ay
6) -6a-6b

Answer 2

It appears that you've written a series of algebraic expressions. Let's simplify each expression step-by-step:

1. (a + 3)7 To simplify this expression, you just distribute the 7 across the terms inside the parentheses: (a + 3)7 = 7a + 21

2. a(a + b) To simplify this expression, you again distribute the 'a' across the terms inside the parentheses: a(a + b) = a^2 + ab

3. (x - y)10 To simplify this expression, you distribute the 10 across the terms inside the parentheses: (x - y)10 = 10x - 10y

4. (a + b - c)2 To simplify this expression, you distribute the 2 across the terms inside the parentheses: (a + b - c)2 = 2a + 2b - 2c

5. a(x - y) To simplify this expression, you distribute the 'a' across the terms inside the parentheses: a(x - y) = ax - ay

6. (a - b)(-6) To simplify this expression, you distribute the -6 across the terms inside the parentheses: (a - b)(-6) = -6a + 6b

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