Решите уравнения:
1) 2x^2 − 4√2x + 3 = 0
2) x^2 − x(√7−2) − 2√7 = 0
3) 2x^2 − 4x − 17 = 0
1) 2x^2 − 4√2x + 3 = 0
2) x^2 − x(√7−2) − 2√7 = 0
3) 2x^2 − 4x − 17 = 0
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Answers & Comments
D=1-4 (-2)=1+8=9=3²
x₁=1
x₂=-2
D=16 -4 2 (-17)=√152