Question

o valor numerico de 2x³-x²-3x,para x=-2,é:

a)-10
b)-14
c)-6
d)18

Answer 1

2 x³- x² - 3x

2.(-2)³-(-2)²-3.(-2)=

2.(-8)- (+4)+6=

-16 -4+6=

-20+6= -14