Question

How to solve X^2+10x=24 by completing the square.

Answer 1

what times what equals 24 and those same numbers have to add upto 10

Answer 2

12 and -2 right?

Answer 3

or 4 and 6

Answer 4

\[x^2+10x=(x+5)^2-25\]
Do you understand this?

Answer 5

no 4 and 6 when u multiply its 24 not -24

Answer 6

srry it has to multiply to -24

Answer 7

... or we could actually help him with the mechanics of the question

Answer 8

*or her

Answer 9

so the answer is (x-2)(x+10)

Answer 10

if you multiply using foils u can see it equals the question

Answer 11

Really, that's not completing the square.

Answer 12

http://en.wikipedia.org/wiki/Completing_the_square
Needs to be in the form

(x+k)^2=c

Answer 13

okie

Answer 14

ur right srry

Answer 15

Okay, @lizzy87 , do you understand why\[x^2+10x=(x+5)^2-25\]?

Answer 16

how didi you get the 5?

Answer 17

Because 2x5=10