If a(a + 6) = 7 and b(b + 6) = 7, where a ≠ b, then a + b =
If a(a + 6) = 7 and b(b + 6) = 7, where a ≠ b, then a + b =
Answer/Solution
−6
Steps/Work
a(a + 6) = 7
=> we have a = 1 or -7
also b(b + 6) = 7
=> b = 1 or -7
given a ≠ b
1) when a =1, b= -7 and a + b = -6
1) when a = -7, b= 1 and a + b = -6
Answer choice B
=> we have a = 1 or -7
also b(b + 6) = 7
=> b = 1 or -7
given a ≠ b
1) when a =1, b= -7 and a + b = -6
1) when a = -7, b= 1 and a + b = -6
Answer choice B