Question

what is the value of c? 4x^2-32x+c. 8?

Answer 1

because 8*4 is 32

Answer 2

so that you have a perfect square?

Answer 3

yes. I think so. a perfect square trinomial.

Answer 4

\[4=2^2\] yes? and we want \[-32=-2\times 2\times c\]

Answer 5

so yes 8 is right!

Answer 6

(2x-8)^2.... c=64?

Answer 7

Really? I got it right?

Answer 8

would it be 8^2 for 64 or just 8?

Answer 9

pmel is right it is 64

Answer 10

and I thought \[c \approx 200000 m/s^2\]

Answer 11

b is 8 so b^2=64

Answer 12

haha

Answer 13

pmel has it. you want a perfect square and it will look like
\[(2x-b)^2\]
\[b=8\]
\[b^2=64\]

Answer 14

in general, when working with perfect square quadratics the last term c is larger than the middle term b is ax^2+bx+c because for all numbers greater than 2 the value (arbitrary constant d) d^2>d+d.