If a(a + 7) = 18 and b(b + 7) = 18, where a ≠ b, then a + b = Choose the correct option: A) −48 B) −2 C) −7 D) 46 E) 48
a(a + 7) = 18   =&gt; we have a = 2 or -9   also b(b + 7) = 18   =&gt; b = 2 or -9   given a ≠ b   1) when a =2, b= -9 and a + b = -7   1) when a = -9, b= 2 and a + b = -7   Answer choice −7
<result>C</result>
If a(a + 7) = 18 and b(b + 7) = 18, where a ≠ b, then a + b =