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If `|(x+1,x-1),(x-3,x+2)|=|(4,-1),(1,3)|`, then write the value of x . |
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Answer» `|[x+1,x-1],[x-3,x+2]| = |[4,-1],[1,3]| ` `|[4,-1],[1,3]| = 4**3-1(-1) = 12+1 = 13` `:. |[x+1,x-1],[x-3,x+2]| = 13` Now, applying `R_2 -> R_2-R_1` on left side, `=>|[x+1,x-1],[-4,3]| = 13` `=>3(x+1)-(-4)(x-1) = 13` `=>3x+3+4x-4 = 13` `=>7x = 14` `=>x = 2` |
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