Ex 3.2, 11 - If x [2 3] + y [-1 1]  = [10 5], find x and y - Ex 3.2

 

  1. Chapter 3 Class 12 Matrices
  2. Serial order wise
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Ex 3.2, 11 If x [ 8(2@3)] + y [ 8( 1@1)] = [ 8(10@5)] , find values of x and y. x [ 8(2@3)] + y [ 8( 1@1)] = [ 8(10@5)] [ 8(2 @3 )] + [ 8( @ )] = [ 8(10@5)] [ 8(2 @3 + )] = [ 8(10@5)] Since the matrices are equal. corresponding elements are equal 2x y = 10 3x + y = 5 Solving equations Adding (1) & (2) (2x y) + (3x + y) = 10 + 5 2x y + 3x + y = 15 2x + 3y y + y = 15 5x + 0 = 15 x = 15/5 x = 3 Putting value of x in (1) 2x y = 10 2(3) y = 10 6 y = 10 y = 10 6 y = 4 y = 4 Hence, x = 3 & y = 4

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