UPSC ESE / IES 2019 (Prelims Exam) Question paper & Key

ESE GENERAL STUDIES ENGINEERING APTITUDE 2019


GATE 2019 CUT-OFF



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Algebra Formulas collection

(a+b) 2  = a 2  + b 2  + 2ab (a-b) 2  = a 2  + b 2  – 2ab (a+b) (a-b) = a 2  – b 2 (x + a)(x + b) = x 2  + (a + b)x + ab (x + a)(x – b) = x ...