Question

1. (x-4) (x – 3)
2. (x + 5) (x + 3)
3. (4x + 1) (5x - 1)
4. (x + 4) (x-4)
plsss help me iwill mark you brainly​

Answer 1

Answer:

$1. \: \: (x - 4)(x - 3) = {x}^{2} - 7x + 12 \\ \\ \\ 2. \: \: (x + 5)(x + 3) = {x}^{2} + 8x + 15 \\ \\ \\ 3. \: \: (4x + 1)(5x - 1) = 20 {x}^{2} + x - 1 \\ \\ \\ 4. \: \: (x + 4)(x - 4) = {x}^{2} - 16$

Answer 2

Answer:

4. x²-4²

2. x²+(5+3)x + 5×3

3. 4x(5x -1 ) + 1(5x -1)

1. x² +[-4 +(-3) ]x +[(-4) (-3)