m=2, m=3-√72(3-√7)a+(3-√7)^2b=16a-2√7a+(9-6√7+7)b=1(6a+9b)-(2a+6b)√7=16a+9b=1, 2a+6b=0.b=-1/9, a=1/3.2a+b=-2/9+1/3=1/9
