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Solve the following : [[2,2,x],[-1,x,4],[1,1,1]]=0 |
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Answer» SOLUTION :`[[2,2,x],[-1,x,4],[1,1,1]]`=0 or, `[[0,2+2x,x+8],[0,x+1,5],[1,1,1]]`=0 (REPLACING `R_1` and `R_2` by `R_1+2R_2` and `R_2+R_3`) or, `1XX[[2+2x,x+8],[x+1,5]]`=0 or, `10+10x-x^2-8x-x-8=0` or, `x^2-2x+x-2=0` or, (x-2)(x+1)=0 `therefore` x=2,x=-1 |
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