Answer :
Step-by-step explanation:
[tex] {6x}^{2} +7 x + {4x}^{2} - 3x - 3y - 2x + {4x}^{2} \\ {6x}^{2} + {4x}^{2} + 4x {}^{2} + 7x - 3x - 2x - 3y \\ {14x}^{2} + 2x - 3y[/tex]
Step-by-step explanation:
[tex] {6x}^{2} +7 x + {4x}^{2} - 3x - 3y - 2x + {4x}^{2} \\ {6x}^{2} + {4x}^{2} + 4x {}^{2} + 7x - 3x - 2x - 3y \\ {14x}^{2} + 2x - 3y[/tex]