Question

Ayudaaaaaaaaaaaaaaaaaaaaaaaa!!!!!!!!

Answer 1

Respuesta:

1)

$4x^{2} + 16x - 4x - 16$

$4 x^{2} + 10x - 16$

2)

$9 {x}^{2} - 24x + 16$

3)

$25 {x}^{2} - 10x + 1$

4)

${x}^{2} -13 x + 42$

5)

$(3 - x) \times (x + 7) \\ 3x + 21 - {x}^{2} - 7x \\ {x}^{2} - 4x + 21$