Question

A) 5√45+3√5-2√125
b) √2+√3x√18
c) (2+√) x (3-√3)
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(2-√3) x (3√3)
d) 1
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125

Answer 1

A) 5√45 + 3√5 - 2√125 =
    $5 \sqrt{ 3^{2}.5 }+3 \sqrt{5}-2 \sqrt{5^2.5}=$
   
    $15 \sqrt{5}+3 \sqrt{5}-10 \sqrt{5} =8 \sqrt{5}$
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$B) \sqrt{2}+ \sqrt{3}* \sqrt{18}= \sqrt{2}+ \sqrt{54}= \sqrt{2}+ \sqrt{2.3^3}= \sqrt{2}+3 \sqrt{6}$
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D) $\frac{1}{125}* \frac{2}{3} = \frac{2}{375}$