Question

solve by completing the square.

p^2+3p-9=0



no answer yet tomas.a :)

Answer 1

how do we complete a square?

Answer 2

that's a good question

Answer 3

you already did that in previous question didn't you?

Answer 4

yes but this is tricky, it's my last one and i'm beat my friends

Answer 5

(x+b)^2 = x^2+2b*x+b^2
you want the number b^2 to be on the end so you can factor it, you know what 2b is from the problem

Answer 6

add (b/2)^2 to both sides

Answer 7

-3-3sqrt5 over 2

Answer 8

p^2+3p+2.25 = 9

Answer 9

wait a sec

Answer 10

p^2+3p+2.25 = 9 + 2.25

Answer 11

(p+1.5)^2 = 11.25
p=+-Sqrt[11.25] - 1.5

Answer 12

i'm sorry, none of what you are saying is making any sense.

Answer 13

how do you foil (x+b)^2?

Answer 14

tomas.a i got -3-3sqrt5over2

Answer 15

yeah but don't foger plus/minus

Answer 16

you are right, thanks!