(1.02)2–(0.98)2=
0.6
0.8
0.06
0.08
Using the identity, a2−b2 =(a+b)(a−b) (1.02)2–(0.98)2=(1.02+0.98)(1.02−0.98) =2×0.04=0.08
Using a2−b2=(a+b)(a−b), find1.022−0.982