Question

factorise x²-7
please it's urgent​

Answer 1

Answer:

$x^2-7$

       Note: $7= (\sqrt{7} )^2$

$x^2-(\sqrt{7})^2$

       Using formula, $x^2-y^2=(x+y)(x-y)$

$(x+\sqrt{7})(x-\sqrt{7})$