((a+8a)2(\sqrt{a} + \sqrt{8a})^2(a+8a)2 = 54 + b2\sqrt{2}2
(a+8a\sqrt{a} + \sqrt{8a}a+8a)(a+8a\sqrt{a} + \sqrt{8a}a+8a)
a + 4a2+8a=54+b2\sqrt{2} + 8a = 54 + b\sqrt{2}2+8a=54+b2
9a + 4a2\sqrt{2}2 = 54 + b2\sqrt{2}2
comparing both sides
9a = 54, so that a = 6
4a = b
b = 4 x 6 = 24.
