Question

Simplify the radical expression (-9√28a^2*1/3√63a)

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Answer 1

a ≥ 0


`-\\ot9^3√(28a^2)*(1)/(\\ot3^1)√(63a)=\\\\ =-3a√(4*7)*√(9*7a)=\\\\=-3a*2√(7)*3√(7a)\\\\ =-18a\sqrt7*\sqrt 7*\sqrt a=\\\\=-18a*(\sqrt7)^2*\sqrt a =\\\\ =-18a*7*\sqrt a=\\\\ =-126a\sqrt a`