Question

to solve x+y=3 and 3x-2y-4=0 by determinant method find D

Answer 1

Step by step Explanations :

x + y = 3

3x - 2y = 4

Comparison to ax + by = c

a1 = 1 , b1 = 1 , c1 = 3

a2 = 3, b2 = -2, c2 = 4

D = ( a1 × b2 ) - ( a2 × b1 )

= [ 1 × ( -2 ) ] - ( 3 × 1 )

= - 2 - 3

D = -5