find the value of a if 2x +3 is a factor of 6x cube +19x sq + 13x + a
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6×(-2/3)³ +19×(-2/3)² +13×(-2/3)+a=0,
6×-8/27 +19×4/9 -26/3 +a=0,
a=16/9 - 76/9 +26/3,
a=(16-76+78)/9,
a=18/9,
then
a=2
6×-8/27 +19×4/9 -26/3 +a=0,
a=16/9 - 76/9 +26/3,
a=(16-76+78)/9,
a=18/9,
then
a=2
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