Answer:
9q²-7a-9=0
b²-f4ac = (-7)²-4(9*-9)= 373
Δ=373; √Δ=√373
(-b-√Δ)/2=(7-√373)/18≈-0,68
(-b+√Δ)/2a =(7+√373)/18≈1,46
Explanation:
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