Решите плиз:1)[latex]( \sqrt{x}- \sqrt{y})^{2}+( \sqrt{x}+ \sqrt{y})^{2} [/latex]2)([latex]2 \sqrt{a}+3 \sqrt{b})^{2}+(2 \sqrt{a}+3 \sqrt{b})(2 \sqrt{a}-3 \sqrt{b}) [/latex]

1)[latex]( \sqrt{x} - \sqrt{y} )^2+( \sqrt{x} + \sqrt{y} )^2[/latex] [latex]( \sqrt{x} )^2-2 \sqrt{xy} +( \sqrt{y} )^2+( \sqrt{x} )^2+2 \sqrt{xy}+( \sqrt{y} )^2 [/latex] [latex]x+y+x+y=2x+2y=2(x+y)[/latex] 2)[latex](2 \sqrt{a}+3 \sqrt{b} )^2+(2 \sqrt{a}+3 \sqrt{b})(2 \sqrt{a}-3 \sqrt{b})[/latex] [latex](2 \sqrt{a} )^2+2*2*3 \sqrt{ab}+(3 \sqrt{b} )^2 +(2 \sqrt{a} )^2-6 \sqrt{ab}+6 \sqrt{ab}-(3 \sqrt{b})^2 [/latex] [latex]4a+12 \sqrt{ab}+9b+4a-9b [/latex] [latex]8a+12 \sqrt{ab} [/latex]

[latex](2\sqrt{a}+3\sqrt{b})^2+(2\sqrt{a}+3\sqrt{b})(2\sqrt{a}-3\sqrt{b})=\\ (2\sqrt{a}+3\sqrt{b})^2+(4a-9b)=\\ 4a+9b+12\sqrt{ab}+4a-9b=8a+12\sqrt{ab}[/latex] [latex](\sqrt{x}-\sqrt{y})^2+(\sqrt{x}+\sqrt{y})^2=x+y-2\sqrt{xy}+x+y+2\sqrt{xy}=2x+2y[/latex]