1.
a) 3(7x+2) = 21x + 6
b) 5(4x-6) = 20x - 30
c) (3x+4) (2x+3) = 6x^2 + 8x + 9x + 12= 6x^2 + 17x + 12
d) (4x-3) (5x+2) = 20x^2 -15x -6 + 8x = 20x^2 - 6 -7x
2.
a) 3(2x-4) + 4(2x+3) = 6x -12 + 8x + 12 = 14x
b) 2(3x-5) -5(2x-4) = 6x -10 -10x +20 = -4x + 10
