Sagot :
1.
[tex] {a}^{2} + 2b \\ {(2)}^{2} + 2(1) \\ 4 + 2 \\ = 6[/tex]
2.
[tex]5b - 2c \\ 5(1) - 2(4) \\ 5 - 8 \\ = - 3[/tex]
3.
[tex]2a + 3b - 4c \\ 2(2) + 3(1) - 4(4) \\ 4 + 3 - 16 \\ 7 - 16 \\ = - 9[/tex]
hope it helps
1.
[tex] {a}^{2} + 2b \\ {(2)}^{2} + 2(1) \\ 4 + 2 \\ = 6[/tex]
2.
[tex]5b - 2c \\ 5(1) - 2(4) \\ 5 - 8 \\ = - 3[/tex]
3.
[tex]2a + 3b - 4c \\ 2(2) + 3(1) - 4(4) \\ 4 + 3 - 16 \\ 7 - 16 \\ = - 9[/tex]
hope it helps