Squaring a binominal I have a really simple question that I can't find the answer to. In a algebra test, I was asked to simplify $(5 + $$\sqrt{3}$)$^2$. What I did was to square each term individually: $5^2$+$\sqrt{3...--prophetes.ai

Squaring a binominal I have a really simple question that I can't find the answer to. In a algebra test, I was asked to simplify $(5 + $$\sqrt{3}$)$^2$. What I did was to square each term individually: $5^2$+$\sqrt{3}$$^2$ I got $25 + 3$ = $28$ This however was the wrong answer. Was there a problem with squaring the binominal? Thanks! Ps, This was their answer: $28+10\sqrt{3}$

$(5+\sqrt{3})^2=(5+\sqrt{3})(5+\sqrt{3})$ then FOIL.