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CBSE Class 10 Answered

solve the pair of linear equation by cross multiplication method ax+by=a-b, bx-ay=a+b
Asked by goldi2507 | 26 Jun, 2018, 11:12: AM
answered-by-expert Expert Answer
begin mathsize 16px style ax plus by equals straight a minus straight b................... left parenthesis 1 right parenthesis
bx minus ay equals straight a plus straight b................... left parenthesis 2 right parenthesis
left parenthesis 1 right parenthesis cross times straight a plus left parenthesis 2 right parenthesis cross times straight b
open parentheses straight a squared plus straight b squared close parentheses straight x equals straight a squared minus ab plus ab plus straight b squared
straight x equals fraction numerator straight a squared plus straight b squared over denominator straight a squared plus straight b squared end fraction equals 1
put space straight x equals 1 space in space left parenthesis 1 right parenthesis
straight y equals negative 1 end style
Answered by Arun | 28 Jun, 2018, 10:26: AM
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