Can you please help me with all these questions??? can you answer all of them please. That would really help. Thank you Simplify by combining like radical terms, if possible: a$.7\sqrt[\phantom{2}]{18}+5\sqrt[\phantom{2}]{8}$ b$.4\sqrt[\phantom{2}]{27x}-8\sqrt[\phantom{2}]{12x}$ c$.7\sqrt[\phantom{2}]{3}-2\sqrt[\phantom{2}]{5}.$ Multiply: a$.(\sqrt[\phantom{2}]{3}+\sqrt[\phantom{2}]{7}{)}^2$ b$.(\sqrt[\phantom{2}]{7}+\sqrt[\phantom{2}]{3})(\sqrt[\phantom{2}]{7}-\sqrt[\phantom{2}]{3})$ c$.(6\sqrt[\phantom{2}]{5}+3\sqrt[\phantom{2}]{2})(2\sqrt[\phantom{2}]{5}-4\sqrt[\phantom{2}]{2}).$ Rationalize each denominator: $\frac{\sqrt[\phantom{2}]{3}}{\sqrt[\phantom{2}]{7}}$ Rationalize the denominator: $\frac{8}{3\sqrt[\phantom{2}]{2}+4}.$ Rationalize the denominator: $\frac{2+\sqrt[\phantom{2}]{5}}{\sqrt[\phantom{2}]{6}-\sqrt[\phantom{2}]{3}}.$