Example

3(r+2s)=2t-4
a⋅(b-2)=3b
3(r+2s)=2t-4
a⋅(b-2)=3b

Question

$$\frac { 6 - x - x ^ { 2 } } { x ^ { 2 } + 4 x + 3 } \geq 0$$

Solve for x

$x\in (-1,2]$

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