Is known a b a b b 2a Θ= + − ( ) then the value of k that k2 0k Θ=Θ meets is ….

Is known a b a b b 2a Θ= + − ( ) then the value of k that k2 0k Θ=Θ meets is ….

A. 0

B. ±3

C. ±2

D. ±1

E. ±4

Jawaban: C