Question

using identify (a-b)² =1 evaluate the following​

Answer 1

Step-by-step explanation:

Using (a+b)

2

=a

2

+2ab+b

2

We can write (10.2)

2

=(10+0.2)

2

= (10)

2

+2(10)(0.2)+(0.2)

2

= 100+4+0.04

Hence the answer is 104.04

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Answer 2

Answer:

(a-b)²

(a)² + (b)² - 2ab

evaluating

if a = √2

b = 1

then,

(√2 - 1)²

(√2)² + (1)² - 2×√2×1

2 + 1 - 2√2

3 - 2√2

3 - 2 × 1.414

3-2.828

0.172