Question

using a suitable identity and without multiplying directly find the value of (0.98×1.02)

Answer 1

Answer:

Let a=1.02 and b=0.98

a

2

−b

2

=(a+b)(a−b)

=(1.02+0.98)(1.02−0.98)

=2(0.04)

=0.08

Hence,

We get 0.08

Answer 2

Let a=1.02 and b=0.98

a

2

−b

2

=(a+b)(a−b)

=(1.02+0.98)(1.02−0.98)

=2(0.04)

=0.08

Hence,

We get 0.08