So that means we can no longer use SP hybridization, because SP hybridization produces only two hybrid orbitals. And we need three, as we see in this case here. So that means we're not combining S and P, but we're combining three orbitals. And these three orbitals are the two S orbital, the two PX orbital, and the two PY orbital. So we combine these atomic orbitals of the boron atom, and we form three identical SP, two orbitals or hybrid orbitals. And these guys look like this hybrid orbital here.