If (a + b + c + d) (a – b – c + d) = (a + b – c – d) (a – b + c – d), prove that a: b = c: d. - Noon Academy

If (a + b + c + d) (a – b – c + d) = (a + b – c – d) (a – b + c – d), prove that a: b = c: d.

Class 10 | Exercise 7C | ICSE | Ratio and Proportion | Selina

If (a + b + c + d) (a – b – c + d) = (a + b – c – d) (a – b + c – d), prove that a: b = c: d.

Rewriting the given, we have

Concise Selina Solutions Class 10 Maths Chapter 7 ex. 7(C) - 16

applying componendo and dividendo:

Concise Selina Solutions Class 10 Maths Chapter 7 ex. 7(C) - 17

Applying componendo and dividendo :

Concise Selina Solutions Class 10 Maths Chapter 7 ex. 7(C) - 18

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