Answered

At Westonci.ca, we connect you with the best answers from a community of experienced and knowledgeable individuals. Ask your questions and receive precise answers from experienced professionals across different disciplines. Get detailed and accurate answers to your questions from a dedicated community of experts on our Q&A platform.

Find the x intercepts of y=2x^2+x-21

Sagot :

Cam943
The x intercept is when y=0. Substitute: 

[tex]2x^2+x-21=0[/tex]

Solve for x by factoring.

[tex]2x^2-6x+7x-21=0[/tex]

[tex]=2x(x-3)+7(x-3)=0[/tex]

[tex]=(x-3)(2x+7)=0[/tex] 

[tex]x=3[/tex] AND [tex]x=-\frac{7}{2}[/tex] 

So therefore, we have our intercepts: 

(3,0) & (-7/2,0) 

Hope that helped!

~Cam943, Moderator


We appreciate your time on our site. Don't hesitate to return whenever you have more questions or need further clarification. We hope our answers were useful. Return anytime for more information and answers to any other questions you have. Westonci.ca is committed to providing accurate answers. Come back soon for more trustworthy information.