Question

simplify==!= 16×(-9)+(-8)×(-9)​

Answer 1

=>16 ×(-9)+(-8)×(-9)

=> -144+72

=> -72

Answer 2

Answer:

$16\times \left(-9\right)+\left(-8\right)\times \left(-9\right)=-72$

Step-by-step explanation:

$16\times \left(-9\right)+\left(-8\right)\times \left(-9\right)$

$\black{\mathrm{Multiply\:and\:divide\:\left(left\:to\:right\right)}\:16\times \left(-9\right)\::}$

$16\times \left(-9\right)$

$\gray{\mathrm{Apply\:rule\:}a\times \left(-b\right)\:=\:-a\times \:b}$

$\gray{16\times \left(-9\right)=-16\times \:9=-144}$

$=-144$

$=-144+\left(-8\right)\times \left(-9\right)$

$\black{\mathrm{Multiply\:and\:divide\:\left(left\:to\:right\right)}\:\left(-8\right)\times \left(-9\right)\::}$

$\left(-8\right)\times \left(-9\right)$

$\gray{\mathrm{Apply\:rule\:}\left(-a\right)\times \left(-b\right)\:=\:a\times \:b}$

$\gray{\left(-8\right)\times \left(-9\right)=8\times \:9=72}$

$=72$

$=-144+72$

$\black{\mathrm{Add\:and\:subtract\:\left(left\:to\:right\right)}\:-144+72\::}$

$-144+72$

$\gray{-144+72=-72}$

$=-72$