Complete the table by providing justification for each step of the proof. Conjecture: If 4 (x2 - 2) = 28, then x is 3 or - 3

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Mathematics

Arianna Kramer

2 April, 13:21

Complete the table by providing justification for each step of the proof. Conjecture: If 4 (x2 - 2) = 28, then x is 3 or - 3

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Melody Curtis · Answer 1

4 (x2 - 2) = 28

4x^2-8=28 Distributive law of multiplication

4x^2+8=28+8 Additive identity

4x^2=36; adding 8 to both sides

x^2 = 9, dividing both sides by 4

x = + / - 3