12√18-6√20-3√50+8√45

Its sum from chapter named number system class 9
in Other Math Topics by Level 1 User (120 points)

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1 Answer

y=12*sqrt(18) -6*sqrt(20) -3*sqrt(50) +8*sqrt(45)

=12*sqrt(2*9) -6*sqrt(4*5) -3*sqrt(2*25) +8*sqrt(9*5)

=12*3*sqrt(2) -2*6*sqrt(5)  -3*5*sqrt(2) +3*8*sqrt(5)

=36*sqrt(2) -15*sqrt(2) -12*sqrt(5) +24*sqrt(5)

=21*sqrt(2) +12*sqrt(5)

=21*1.414213562  +12*2.236067977

=29.69848481  +26.83281573

=56.53130054
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