Question

find out value of x in 9 whole (x/2-5)+12=12​

Answer 1

Step-by-step explanation:

Hint:

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

Comparing the corresponding elements, we get: x=1,y=4, and z=3

(ii) [ x+y 5+z²xy ]=[ 65² 8 ]

As the given matrices are equal, their corresponding elements are also equal. Comparing the corresponding elements, we get:

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

Now, 5+z=5⇒z=0

We know that:

(x−y)

2

=(x+y)

2

−4xy

⇒(x−y)

2

=36−32=4

⇒x−y=±2

Now, when x−y=2 and x+y=6, we get x=4 and y=2

When x−y=−2 and x+y=6, we get x=2 and y=4

∴x=4,y=2 and z=0orx=2,y=4 and z=0

x+y+z=9 ....(1)

x+z=5 ....(2)

y+z=7 ....(3)

From (1) and (2), we have:

y+5=9

⇒y=4

Then, from (3), we have: 4+z=7

⇒z=3

∴x+z=5

⇒x=2

∴x=2,y=4 and z=

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Answer 2

x/2 -5 =12-12=0

x/2 =5

x= 10