Given polynomial
[tex]x^2-4[/tex]Use the algebric identities of square :
[tex](a+b)(a-b)=a^2-b^2[/tex]Find the Greatest common factor in the polynomial
[tex]x^2-4^{}^{}[/tex]The GCF is one
Now, to factor this problem, determine what squares will equal to x^2 and what square will equal to 4
Since,
[tex]x^2=x\times x,4=2\times2^{}[/tex]Substitute the value in the g
