SOLUTION: How can i estimate the roots of the equation, (y=x^2-4) by using a graph?

SOLUTION: How can i estimate the roots of the equation, (y=x^2-4) by using a graph?

Algebra.Com

Question 23084: How can i estimate the roots of the equation, (y=x^2-4) by using a graph?
Answer by rapaljer(4671) (Show Source): You can put this solution on YOUR website!
Finding roots by use of a graph is getting to be one of best methods available, especially with graphing calculators. Just draw the graph, and the roots are the values of x, where the graph crosses the x-axis.

In this case, notice that the graph crosses the x-axis at x= 2 and x= -2, so the roots are x= 2 and x= -2.

R^2 at SCC
RELATED QUESTIONS
How can i estimate the root of the equation using a graph, (y=... (answered by rapaljer)

estimate the roots of the equation: y = x^2 - 4 (answered by ewatrrr)

the chapter title is : Quadratic Equations and Functions Referring to the figure, use... (answered by jim_thompson5910)

How do I find the roots of y=x^2-8x+7 by factoring and also by using the quadratic... (answered by tutor_paul)

I need to find an equation with a vertex of (10,10), and roots of 0 and 20. When I use... (answered by ikleyn)

how do i find the roots of this equation using the quadratic formula?... (answered by solver91311)

Draw the graph of y=4+2x-x^2 for values of x from -2 to 4 using a scale of 2cm to... (answered by Boreal)

Can I solve the equation x^2-6x+5=0 by Nature of Roots?, If so... (answered by richard1234)

estimate the roots of the equation: y = x^2 - 2x - 8 (answered by ewatrrr)