Question

If (a+b)2 = a + 6a +9, let's find, which of the following is the positive value for b.​

Answer 1

Explanation:

$(a + b)2 = a + 6a + 9 \\ = 2a + 2b = a + 6a + 9 \\ \\2b = 7a + 9 - 2a$

$2b = 5a + 9 \\ \\ b = 5a + 9 \2$

b=5a/2+9/2

hope it will help you to better understand