need answer please (distributive law) grade 9 mathematics

Answer:
[tex]7 {x}^{2} + 19x - 8 \\[/tex]
Step-by-step explanation:
[tex]2(3 {x }^{2} + 8x - 4) + x(x + 3) \\ 6 {x}^{2} + 16x - 8 + {x}^{2} + 3x \\ 6 {x}^{2} + {x}^{2} + 16x + 3x - 8 \\ 7 {x}^{2} + 19x - 8[/tex]