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2x – 5y = 7 and x – 2y = -7 then a1b2 – a2b1 = __________​

Answer»

From EQUATION 1: a1 = 2 and B1 = -5FROM equation 1: a2 = 1 and B2 = -2Now,a1b2 - a2b1 = 2(-2) - 1(-5) = -4+5 = 1.Hope it helps.Mark Brainer.Thanks.Like Follow and Rate.Teacher.



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