Question

Solve:[determinant]
|4 3 9|
3 -2 7
4 4 x. = -1

Answer 1

hi friend,


by expanding the given question , we get 4(-2x-28)-3(3x-28)+9(12+8)=-1

→-8x-112-9x+84+180=-1

→ -17x+180-28=-1

→-17x+152=-1

→17x=153

x=9


I hope this will help u ;)

♥dhathri123♥

Answer 2

|4 3 9|
|3 -2 7| = -1
|4  4 x| 
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expanding we get

4(-2x-28) - 3(3x-28) + 9(12+8) = -1

-8x - 112 -  9x + 84 + 108 + 72 = -1

-8x -112 - 9x + 84 +108 +72 = -1

-17x + 152 = -1

-17x = -153

x = 153/17

x=9
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the value of x = 9