Question

Helpp please with:
find the value of c that makes the polynomial a perfect square trinomial.
x^2+8x+c

Answer 1

@zarkam21 it is the same process u did just right now

Answer 2

I understand but I usually get assistance =)

Answer 3

Because I am new to the process

Answer 4

DO the second term as follow : \[ \pm (\frac{ b }{ 2 } ) ^{2}\]
it will be much better to do it first, u will learn more that way

Answer 5

so 8/2

Answer 6

(8/2)^2

Answer 7

yes

Answer 8

16?

Answer 9

yes now add 16 to both side of the equation , or add 16 and subtract 16

Answer 10

16x^2 +16+16?

Answer 11

\[x ^{2} + 8x +16 - 16\]

Answer 12

no, substitute 16 for 'c'

Answer 13

Oh okay I see what you did

Answer 14

now u have a complete square and of \[(x+4) ^{2} - 16 \]

Answer 15

Oh okay and then c would be 16?

Answer 16

hafeda, i think you are over solving the problem
and yes, zarkam21, c would be 16 :D

Answer 17

and that is constant out the square is the "C"
@chiunlee12 i just want her to understand the process, and same time that ask it differently

Answer 18

@zarkam21 yes c = 16

Answer 19

Would it be the same process for this

Answer 20

@hafeda Yeah, I understand what you tried to do there, and your explanation was great

Answer 21

Okay now that is almost the same as the first question

Answer 22

Wants a perfect square trinomial, a polynomial with 3 terms and factors like
(a - b)^2 = (a - b)(a - b) = a^2 - 2ab + b^2
or
(a + b)^2 = (a +b)(a + b) = a^2 + 2ab + b^2

notice the last term in these are squares, 2^2 ,3^2 , 4^2 , 6^2,....

x^2+8x+c

to get an 8 in the middle from the sum of 2 *perfect square, you need to use 4

(x + 4)^2 = x^2 + 8x + 16

Answer 23

Okay and then we would continue to solve for b am I correct?

Answer 24

@3mar

Answer 25

3mar is here!

Answer 26

Yay =)

Answer 27

so?
where did you reach?