Question

Where does the graph of y = 2x2 + x − 15 cross the x-axis?

Answer 1

for y-intercepts
set x = 0
so you get (0,y) point

for x-intercepts
set y = 0
so you get (x,0) point

Answer 2

and solve for the other variable

Answer 3

A plot of \[2 x^2+x-15 \]is attached.

Answer 4

a point on x-axis always has its y co-ordinate as 0. so substitute y = 0 in the given eq.
u'll get 2x^2 +x - 15 = 0. now solve this as any quadratic equation and u'll have ur answer.