Question 236907: Solve using quadratic equations:
a) x² + 3x = 10
b) 4 x² + 12x = 40
c) 4 x² + 12x + 9 = 40 + 9
d) 4 x² + 12x + 9 = 49
Answer by nyc_function(2741)   (Show Source):
You can put this solution on YOUR website! What do you mean solve using the quadratic equation?
Each problem you have is already in equation form.
I think you meant to say: Solve using the quadratic formula.
Also, post one question at a time or else tutors will ignore your post.
To learn about the quadratic formula and how to use it, see link below.
http://www.purplemath.com/modules/quadform.htm
If you do not understand the link, write back.
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