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x₁+x₂ = -b/a = -(-8)/4 = 2
x₁.x₂= c/a = 10/4 = 5/2
x₁-x₂ = D/a
= (b²-4ac)/a
= (64-4.4.10)/4
= (64-160)/4
= -96/4
= -24
a)
b) (x₁-x₂)² = (-24)² = 576
semoga membantu ya :)