Question

Find the domain and range of
x² – 121
​

Answer 1

x²-121=0

x²=121

x=√121

x=11

x=-11

hope u get ur answer...✌️

Answer 2

Step-by-step explanation:

${x}^{2} - 121 = y \\ {x}^{2} - {(11)}^{2} = y \\ {x}^{2} = y + {(11)}^{2} \\ x = \sqrt{y + {(11)}^{2} }$

.: Range :

$y + {(11)}^{2} \geqslant 0 \\ y \geqslant - 121$

y ∈ [ -121 , + ∞ )

${x}^{2} - {(11)}^{2} \geqslant 0 \\ (x - 11)(x + 11) \geqslant 0$

.: Domain : x ∈ ( - ∞ , - 11 ] ∪ [ + 11 , + ∞)