Question

What are the x-intercepts of y = 2x2 - 3x - 20?

Answer 1

\[y=2x^2-3x-20\]
\[when\ y=0:\]
\[2x^2-3x-20=0\]
\[(2x+5)(x-4)=0\]
\[2x+5=0 \rightarrow x=-5/2\]
\[x-4=0 \rightarrow x=4\]
therefore, x-ints are (-5/2,0) and (4,0)