Question

1) To solve x + y = 4, 3x - 2y = 4 by determinant method. Find the value of D? a) 2 b) c) 3 d) -5​

Answer 1

Answer:

-5

Step-by-step explanation:

first we find determine in determination 1st and 4th place will be multiply while the 2nd and 3rd place digits are multiply

Answer 2

Step-by-step explanation:

Rule:-

• Cramer's rule

Let's solve

• x+y=3
• 3x-2y=4

Then we get :-

• D =
• $\: 1 \div 3$

And

$1 \div - 2$

$= (1 \times - 2) - (3 \times 1) \\ = - 2 - 3 = - 5$

Required answer:-

-5

Hence Option d is Correct

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