Prove that (a/b)+(c/d)=(ad+bc)/(bd) {simple explanation}

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Prove that (a/b)+(c/d)=(ad+bc)/(bd) {simple explanation}

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Prove that (a/b)+(c/d)=(ad+bc)/(bd) 0:02:17

Prove that (a/b)+(c/d)=(ad+bc)/(bd) {simple explanation}

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If in `DeltaABC, AD_|_ BC,`then prove that `AB^(2) + CD^(2) = AC^(2) + BD^(2)`

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Prove:⁡⁡ (a⁡+⁡b⁡i)(c⁡+⁡d⁡i)⁡ = ⁡(ac⁡-⁡bd) + ⁡(ad⁡+⁡bc)⁡i

Комментарии
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It would have been useful to mention that the purpose for this is that you end up with a common denominator, though it may not be the least common denominator (LCD). It might not be obvious to everyone at first why you would do this is d/d and b/b both equal 1 anyway.

Krazycutiegurlxxx
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could you help me with this (a/b)/(c/d)=ad/cd, please

bryanmunoz
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When do you use dis formula? Quiz tomorrow. Replies would mean a lot.

escaleetor
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please give me solution of If a :b = c:d then prove that a /b= a+c/b+d

dineshpaliwal
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Why can't u substitute "b/b" for "1" near a/b in 3rd line

vijaymalhotra
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How could you prove.

Show that if a, b, c and d are integers, where! = 0, such that a | c and b | d, then ab | cd?

blackstreet
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thank u so much but it would be better if u gave us an example with numbers but thanks for everything

maydad
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Ohhh, you helped me a lot - finally got it and now I recognize the axioms! :D

Milusan
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Can you prove this without using the assumption that (a/b)(c/d) = (ac/bd)?

toddqualiano
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a/b - c/d = (ad - bc)/(bd) please prove this

donhunbe