MCQ
Ordered pair that satisfy the equation $x + y + 1 < 0$ is:
- A$(0, -1)$
- B$(-2,0)$
- ✓$(2, -4)$
- DBoth $(B)$ and $(C)$
✓
Answer
Correct option: C.
$(2, -4)$
Given inequation is $x + y + 1 < 0$
From option $A, 0 + (-1) + 1 < 0$
$\Rightarrow 0 < 0$ which is false
Hence, $(0, -1)$ is not a solution.
From option $B, -2 + 0 + 1 < 0$
$\Rightarrow -1 < 0$ which is true
Hence, $(-2,0)$ there is a solution.
From option $C, 2 - 4 + 1 < 0$
$\Rightarrow -1 < 0$ which is true.
Hence, $(2,-4)$ is a solution.
From option $A, 0 + (-1) + 1 < 0$
$\Rightarrow 0 < 0$ which is false
Hence, $(0, -1)$ is not a solution.
From option $B, -2 + 0 + 1 < 0$
$\Rightarrow -1 < 0$ which is true
Hence, $(-2,0)$ there is a solution.
From option $C, 2 - 4 + 1 < 0$
$\Rightarrow -1 < 0$ which is true.
Hence, $(2,-4)$ is a solution.
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