SOLUTION: Let y=2x(squared0)+7x+5.Use the quadratic formula to determine the x-intercepts,find the y-intercepts and then sketch the graph.

Algebra ->  Quadratic Equations and Parabolas -> SOLUTION: Let y=2x(squared0)+7x+5.Use the quadratic formula to determine the x-intercepts,find the y-intercepts and then sketch the graph.       Log On


   

Question 478399: Let y=2x(squared0)+7x+5.Use the quadratic formula to determine the x-intercepts,find the y-intercepts and then sketch the graph.
Answer by mananth(16946) About Me  (Show Source):
You can put this solution on YOUR website!
y=2x^2+7x+5
Find the roots of the equation by quadratic formula

a= 2 b= 7 c= 5

b^2-4ac= 49 - -40
b^2-4ac= 9
sqrt%28%099%09%29= 3
x=%28-b%2B-sqrt%28b%5E2-4ac%29%29%2F%282a%29
x1=%28-b%2Bsqrt%28b%5E2-4ac%29%29%2F%282a%29
x1=( -7 + 3 )/ 4
x1= -1
x2=( -7 -3 ) / 4
x2= -2.5
-1 & -2.5 are the x intercepts
y intercept =5