## anonymous 5 years ago 49b^2+41b+9 Solve showing step by step please

1. amistre64

what do you get when you try it?

2. amistre64

the most basic method would be to complete the square; which is just the long hand version of the quadratic formula

3. anonymous

$49b^2+41b+9$ $ax^2+bx+c=0$ quadratic formula:$roots = {-b \pm \sqrt{\Delta} \over 2a}$ where,$\Delta = b^2-4ac$

4. amistre64

isnt writing delta for a shortcut, and then haveing to define delta kinda defeating the purpose of writing delta to begin with ;)

5. anonymous

That's an expression and not an equation

6. anonymous

well, it depends.. you can use Delta to find the vertex so... you never know, always good to have as a side (:

7. amistre64

how do you use delta, the discriminate, to find the vertex?

8. anonymous

After you find Delta, discriminate the points of vertex should be: y=-D/4a at x=-b/2a