Решите уравнение: А) x3 – x = 0 Б) x2 – 24x + 144 = 0 В) 25y2 – 49 = 0

Question

Решите уравнение:
А) x3 – x = 0
Б) x2 – 24x + 144 = 0
В) 25y2 – 49 = 0

Answer 1

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x³-x=0

x*(x²-1)=0

x₁=0

x₂=1

x₃=-1
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x² – 24x + 144 = 0

(x-12)²=0

x-12=0

x=12

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25y₂– 49 = 0 
25y²=49
y²=49/25
y₁,₂=+-(7/5)