√32+√50-√72=
√2*(√18+√50)=
(1/√3)+(1/√9)+(1/√27)+(1/√81)=
√32+√50-√72= √16*2 + √25*2 - √36*2 = 4√2 + 5√2 -6√2 = 3√2
√2*(√18+√50)= √2*√18 + √2 * √50 = √2*18 + √2*50 =
= √36 + √100 = 6 + 10 = 16
(1/√3)+(1/√9)+(1/√27)+(1/√81)= (1/√3 * √3/*√3) + 1/3 +
+(1/√27 * √27/√27) + 1/9 = 1/3 *√3 + 1/3 + 1/27 *√27 + 1/9 =
= 1/3 *√3 + 1/3 + 1/27 *√9*3 + 1/9 = 1/3 *√3 + 1/3 + 1/27 *3√3 + 1/9 =
= 1/3 *√3 + 1/3 + 1/9√3 + 1/9 = 3/9 √3 + 1/9 √3 + 3/9 + 1/9 =
= 4/9 √3 + 4/9 = 4/9 (√3 +1)
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√32+√50-√72= √16*2 + √25*2 - √36*2 = 4√2 + 5√2 -6√2 = 3√2
√2*(√18+√50)= √2*√18 + √2 * √50 = √2*18 + √2*50 =
= √36 + √100 = 6 + 10 = 16
(1/√3)+(1/√9)+(1/√27)+(1/√81)= (1/√3 * √3/*√3) + 1/3 +
+(1/√27 * √27/√27) + 1/9 = 1/3 *√3 + 1/3 + 1/27 *√27 + 1/9 =
= 1/3 *√3 + 1/3 + 1/27 *√9*3 + 1/9 = 1/3 *√3 + 1/3 + 1/27 *3√3 + 1/9 =
= 1/3 *√3 + 1/3 + 1/9√3 + 1/9 = 3/9 √3 + 1/9 √3 + 3/9 + 1/9 =
= 4/9 √3 + 4/9 = 4/9 (√3 +1)