tolong bantu jawab kak

ax²+bx+c → x²+6x+2
x₁+x₂=-b/a=-6
x₁.x₂=c/a=2

⇒x₁²+x₂²=(x₁+x₂)²-2x₁.x₂
x₁²+x₂²-4x₁.x₂=...
=(x₁+x₂)²-2x₁.x₂-4x₁.x₂
=(-6)²-2(2)-4(2)
=36-12
=24