Question

resultado y procedimiento

Answer 1

Respuesta:

$(x + 7)(x + 9) = \\ x {}^{2} + 9x + 7x + 63 \\ x {}^{2} + 16x + 63$

$(x - 5)(x + 3) = \\ x {}^{2} + 3x - 5x - 15 \\ x {}^{2} - 2x - 15$

$( x - 3)(x - 8) = \\ x {}^{2} - 8x - 3x + 24 \\ x {}^{2} - 11x + 24$

$(4ax {}^{2} )(3x {}^{2} - 6x + 7) = \\ 12ax { }^{4} - 24ax {}^{3} + 28ax {}^{2} =$

$( - 2x)(x {}^{2} - 4x + 3) = \\ - 2x {}^{3} + 8x {}^{2} - 6x =$

$(3ab)(a { }^{3} - 4a {}^{2} + 6a) = \\ 3ab {}^{4} - 12ab {}^{3} + 18ab { }^{2} =$