Question

$(6\sqrt{15} -\sqrt{14} )^{2} + 12\sqrt{210}$

Answer 1

$(6\sqrt{15})^{2} - 12\sqrt{15}\cdot \sqrt{14} + (\sqrt{14})^{2} + 12\sqrt{210}$

$(6\sqrt{15})^{2} - 12\sqrt{210} + (\sqrt{14})^{2} + 12\sqrt{210}$

$(6\sqrt{15})^{2} + (\sqrt{14})^{2}$

$36\cdot15+14$

554