abbi2306311 abbi2306311

03-04-2017
Mathematics

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Solve Radical Equations
sqrt(28)+sqrt(63)+sqrt(175)

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ghanami ghanami

03-04-2017

hello :
175=7×5²
63=7×3²
28 = 7×2²
√175 =√(7×5²) =5 √7
√63 = √(7×3²) =3√7
√28 =√( 7×2²) = 4√7
√28+√63+√175 =4√7 +3√7 +5 √7 =(4+3+5) √7 =12 √7

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