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Sagot :
Answer:
The first two equations.
Step-by-step explanation:
The first equation:
x² - 100 = 0
x² = 100
√x² = √100
x = ±10
x = 10 or -10
Second equation:
(x - 6)² = 25
√(x - 6)² = √25
x - 6 = ±5
x - 6 = 5 or x - 6 = -5
x = 11 or 1
It seems that for the other two equations, you have to complete the square and factor them out.
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