Question

If a=√2+1,the value of (a - 1)²​

Answer 1

Step-by-step explanation:

a = √2 + 1

a - 1 = √2

(a - 1)²

(√2)²

= 2

Answer 2

Answer:

${(a - b)}^{2} = {a}^{2} - 2ab + {b}^{2} .....formula \\ {(a - 1)}^{2} = {a }^{2} - 2a (- 1) + ({ - 1})^{2} \\ = {a}^{2} + 2a + 1$

now it will be easy to you to get answer by substituting the value of a

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