Question

introduceti factorul de sub radical !! Ajutati cine cunoaste mai bine de cit eu!! dau 20 de puncte!!

Answer 1

$a) \frac{2}{3} \sqrt{27} = \sqrt{ \frac{4}{9} \cdot 27} = \sqrt{12} \\ \\ b) a \sqrt{3} = \sqrt{a^2\cdot3} = \sqrt{3a^2} \\ \\ c) (b-1) \sqrt{b} = \sqrt{(b-1)^2 \cdot b} = \sqrt{(b^2-2b+1) \cdot b} = \sqrt{b^3 - 2b^2+b}$