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Δ=9+16=25 √Δ= 5
x1=1/4*-3-5= -2
x2= 1/4*-3+5=1/2
Δ=b²-4ac
Δ= 3²-4*2*(-2)
Δ= 9+16
Δ= 25
√Δ=5
x₁=-b-√Δ/2a
x₁= -3-5/2
x₁=-8/2*2
x₁=-8/4
x₁= -2
x₂=-b+√Δ/2a
x₂= -3+5 /2*2
x₂= 2 /4
x₂= ½
y=(x+2)(x-½)