Tolong di jawab pakai caranya ya .... soalnya yg sy lingkari

Tolong di jawab pakai caranya ya …. soalnya yg sy lingkari

1 b. (-5k)^3 untuk k = -6
(-5 x -6)^3 = 30^3 = 27.000

c. (2-9k)^2
= (4 – 9(-6))^2
= (4 + 54)^2
= (58)^2 = 3.364

d. -3 k^2 + 7k
= – 3 (-6)^2 + 7(-6)
= -3(-36) – 42
= 108 – 42= 66

2a. a^2 – 8 untuk a = 5
(5)^2 – 8= 25-8 = 17

semoga membantu

$a.{ (- 5k)}^{3} = { ( - 5( - 6)}^{3} = {(30)}^{3} = 27.000 \ b. {(2k - 9)}^{2} = {(2( - 6) - 9)}^{2} = {( - 12 - 9)}^{2} = { - 21}^{2} = 441 \ c. ( - 3 {k}^{2} + 7k) =( - 3 { (- 6)}^{2} + 7( - 6) = - 3(36) + ( - 42) = - 108 - 42 = - 150$