Step-by-step explanation:
[tex]12 {x}^{2} + 2 {x}^{2} - 30x - 5 \\ = 14 {x}^{2} - 30x - 5[/tex]
12x² + 2x² – 30x – 5
14x² – 30x – 5
=> 12x² + 2x² – 30x – 5
=> 14x² – 30x – 5
