ini gimana jawabnya?

Bentuk umum persamaan
ax² + bx + c = 0

2x² - 4x - 3 = 0

maka
a = 2
b = -4
c = -3

x₁.x₂ = c/a
        = -3/2

x₁ + x₂ = -b/a
           = -(-4) / 2
           = 2

x₁² + x₂² = (x₁ + x₂)² - 2.x₁.x₂
              = (2)² - 2(-3/2)
              = 4 - (-3)
              = 4 + 3
              = 7

Jawaban A