ex 1
A=
[tex]7x + 4 \times 7 = 7x + 28[/tex]
B
[tex]4 \times 3 - 2x \times 4 = 12 - 8x[/tex]
C
[tex] - 3x + 7 \times ( - 3) = - 3x - 21[/tex]
D
[tex] - 5 \times 3x + ( - 5) \times - 2 = - 15x + 10[/tex]
E
[tex] - 2x \times 5 - 2x \times 4x = - 10x - 8x = - 18x[/tex]
F
[tex]3 {x}^{2} + ( - 3 {x}^{2} \times ( - 2x)) = {3x}^{2} - {3x}^{2} \times - 2x[/tex]
