Question

factorise using idenrtity (a+b)^2 and (a-b)^2
x^2+2+1/x^2​

Answer 1

Answer:

${x}^{2} + 2 + \frac{1}{ {x}^{2} } = {x}^{2} + ( \frac{1}{x} ) {}^{2} + 2 \times x \times \frac{1}{x} = (x + \frac{1}{x} ) {}^{2}$