reynolds840 reynolds840

25-05-2023
Mathematics

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Which reason justifies step C in the following proof? Conjecture: If 3x² + 10 = 100, then z = ±√/30

3x² + 10 = 100 A given

3x² = 90 B subtraction property of equality

x² = 30 C. ?

2=±√30 D square root property

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