What is -12x-5(-8)=40
2 answers:
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For 
where n is the highest power of the function
if n is even and 'a' is positive, the graph goes from top left to top right
if n is even and 'a' is negative, the graph goes from bottom left to bottom right
if n is odd and 'a' is positive, the graph goes from bottom left to top right
if n is odd and 'a' is negative, the graph goes from top left to bottom right
and, for
, it intersects the graph at 
, 
,
, up to 
,
so see what we've got
factor and group
a=-1 the roots are x=-2, x=-1, x=2 since n=3 (from 
) and a is negative, we know it goes from top left to bottom right also, it intersects at x=-2,-1, and 2
answer is the 3rd option: <span>It starts up on the left and goes down on the right and intersects the x-axis at x = −2, −1, and 2.</span>
if n is even and 'a' is positive, the graph goes from top left to top right
if n is even and 'a' is negative, the graph goes from bottom left to bottom right
if n is odd and 'a' is positive, the graph goes from bottom left to top right
if n is odd and 'a' is negative, the graph goes from top left to bottom right
and, for
so see what we've got
factor and group
answer is the 3rd option: <span>It starts up on the left and goes down on the right and intersects the x-axis at x = −2, −1, and 2.</span>