Jika N = , M = , dan N = M, maka nilai a dan b adalah ....
a = −7 ∨ a = −32 ; b = 1
a = 52 ∨ a = 2 ; b = −1
a = −7 ∨ a = 2 ; b = −5
a =25 ∨ a = −7 ; b = −1
a = −7 ∨ a =21 ; b = −1