Question

To Save 2x+3y = 3 and ar-24-4co
by Determinant method find the value of
D only.​

Answer 1

$\rm\bf\underline{Solution:}$

Determinant method (Cramer’s Rule) :

In Cramer’s method, the equations are written as a1x + b1y = c1 & a2x + b2y = c2.

The value of determinant :

D = |a1 b1|

       |a2 b2|

D = a1b2 - a2b1

SOLUTION :

Option C is Correct : -5

GIVEN :

x + y = 3 , 3x - 2y - 4=0

Write the equations as a1x + b1y = c1 & a2x + b2y = c2.

x + y = 3 , 3x - 2y = 4

Here, a1= 1,b1= 1,c1= 3

a2 = 3, b²= - 2 , c2 = 4

The value of determinant :

D = |a1 b1|

       |a2 b2|

D = |1 1 |

       |3 -2|

D = a1b2 - a2b1

D = (1×-2) - ( 3×1)

D = -2 -3 = -5

Hence , the value of D is - 5.

HOPE THIS WILL HELP YOU…