Q. 6 B4.3( 83 Votes )

Find the values o

Answer :

Since, the given matrices are equal, their corresponding elements are also equal.

Comparing the corresponding element, we have:


x + y = 6, xy = 8, 5 + z = 5


Now, 5 + z = 5
 ⇒ z = 0


x+ y = 6
⇒ x = 6 - y 

Also, 
xy = 8
⇒ (6 - y)y = 8
⇒ 6y - y2 = 8
⇒ y2 - 6y  + 8 = 0
⇒ y2 - 4y - 2y + 8 = 0
⇒ y(y - 4) - 2(y - 4) = 0
⇒ (y - 2)(y - 4) = 0

Hence, y = 2 or y = 4
when y = 2 
x = 6 - 2 = 4

when x = 4
x = 6 - 4 = 2

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