Question

k(s)=3s^2-s+6
K(-s) ; k(2s)

Answer 1

k(-s) = 3(-s)^2 -(-s) + 6 = 3s^2 + s +6

Answer 2

k(2s) = 3(2s)^2 - (2s) + 6 = 3*4s^2 -2s +6 = 12s^2 - 2s + 6

Answer 3

so that -(-s) becomesa positive s+6

Answer 4

yup double negative is a positive.

Answer 5

how does 3(-s)^2 become 3s^2 rather than just 3s
?

Answer 6

anything to an even power becomes positive itself to an even power

Answer 7

(-2)^2 = 2^2 = 4
(-a)^4 = a^4
(t)^2 = t^2, (-t)^2 = t^2

Answer 8

oh okay..so i dont look at it as (-s)(-s)=s...it just remains squared?

Answer 9

well (-s)(-s) = s^2.. like i said
(-s)(-s) = -1(s^1)*-1(s^1) = (-1*-1)(s^1 * s^1) = 1*s^(1+1) = s^2