Matrices and Determinants 2 Question 27

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30. The solution set of the equation 1420 125=0 is… . 12x5x2

======= ####30. The solution set of the equation |1420125|=0 is…

3e0f7ab6f6a50373c3f2dbda6ca2533482a77bed

(1981, 2M)

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Answer:

Correct Answer: 30. (-1 ,2)

Solution:

  1. Given, |142012512x5x2|=0

1(10x210x)4(5x25)+20(2x+2)=0

30x2+30x+60=0

(x2)(x+1)=0

x=2,1

Hence, the solution set is 1,2.



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