0}} \right.\\\left \{ {{2x\geq15 } \atop {-3x>-12}} \right.\\\left \{ {{x\geq7,5 }\atop {x<4}} \right.\\5)\sqrt{7}*\sqrt{63}-\frac{\sqrt{27} }{\sqrt{12} }=\sqrt{7*7*9}-\sqrt{\frac{3*9}{3*4} }=7*3-\frac{3}{2}=21-1,5=19,5" alt="3)5\sqrt{36}-2(\sqrt{3})^{2}=5*6-2*3=30-6=24\\4)\left \{ {{2x-15\geq0 } \atop {12-3x>0}} \right.\\\left \{ {{2x\geq15 } \atop {-3x>-12}} \right.\\\left \{ {{x\geq7,5 }\atop {x<4}} \right.\\5)\sqrt{7}*\sqrt{63}-\frac{\sqrt{27} }{\sqrt{12} }=\sqrt{7*7*9}-\sqrt{\frac{3*9}{3*4} }=7*3-\frac{3}{2}=21-1,5=19,5" align="absmiddle" class="latex-formula">
В четвёртом задании ответ : решений нет