Question

how to factorise x square minus 2 root 5 x + 3​

Answer 1

$\fontsize{18}{10}{\textup{\textbf{The required ans is [x-(rt5+rt2)][x-(rt5-rt2)]}}}$

Step-by-step explanation:

Given expression

x^2-2rt5x +3

=x^2 - (rt5+rt2)x - (rt5-rt2)x+ (rt5+rt2)(rt5-rt2)

=x{x-(rt5+rt2)} - (rt5-rt2){x-(rt5+rt2)}

={x-(rt5+rt2)}{x-(rt5-rt2)}