Question

simplify : (✓2-1)^2.​

Answer 1

$\large \: \: \: \bold{ {( \sqrt{2} - 1)}^{2} }$

$\large \bold{ = {( \sqrt{2} )}^{2} - 2 \times \sqrt{2} \times 1 + {1}^{2} }$

$\large \bold{ = {2} - 2 \sqrt{2} + {1} }$

$\large \bold{ = {3} - 2 \sqrt{2} }$

★ Formula required:-

$\large \boxed{ \bold{ {(x - y)}^{2} = {x}^{2} - 2xy + {y}^{2} }}$