Any chance i can have a step by step demo of these. thanks.
-x + 8X - 15 = 0
6x^2 - 17x + 5 = 0
-3b^2 - 26b = -9
For the first one, get rid of the negative sign in front of :
For the second one, use the quadratic formula:
Try doing the last one yourself. I'd recommend that you divide through by -3 to clean things up a little bit!
I hope this helped you out!
Your third equation can be factored as well:
Multiply by -1
1. Multiply leading coef. times constant: 3 X 9 = 27
2. Find factors of 27 that add up to 26. That woud be -1 and 27
3. Replace 26b with these 2 factors.
4. Factor by grouping