Question

*For equations y+2x=19 and 2x-3y=-3 find D.*

1️⃣ -8
2️⃣ -6
3️⃣ -4
4️⃣ 8​

Answer 1

Answer:

*For equations y+2x=19 and 2x-3y=-3 find D.*

1️⃣ -8

2️⃣ -6

3️⃣

Answer 2

$\LARGE\textbf{SOLUTION :-}$

$\large\textsf{2x + y = 19}$

$\large\textsf{2x - 3y = -3}$

$\large\textsf{D =}\left[\begin{array}{cc } 2 & 1 \\ 2 & -3 \end{array}\right]\large\textsf{= ( 2 × -3 ) - ( 1 × -3 )}$

$\large\therefore\textsf{D = 6 - ( - 3 )}$

$\large\therefore\textsf{D = 6 + 3}$

$\large\therefore\textsf{\colorbox{silver}{D = 9 }}$