Question

1. Tent luas perm kubus jika rusuknya 9cm.
2. Tent HP dari pers kuadrat 2x^+7x+3=0

Pliss bantuin.. ntar gua jadiin terbaik dehh :D

Answer 1

1) LP = s² × 6
         = 9² × 6
         = 81 × 6
         = 486 cm²


2)            2x² + 7x + 3 = 0
         2x² + 6x + x + 3 = 0
    2x(x + 3) + 1(x + 3) = 0
           (2x + 1) (x + 3) = 0

    2x + 1 = 0
          2x = -1
          x₁ = -1/2

    x + 3 = 0
         x₂ = -3

    Himpunan Penyelesaian = {x₁, x₂} = {-1/2, -3}

Answer 2

1) luas kubus = 6r²
                     = 6 x 9 x 9
                     = 486 cm²

2) 2x² + 7x + 3 = 0
     (2x + 1) (x + 3) = 0
     x = -1/2 atau x = -3

semoga membantu ya :)