3 years ago

Solve for x. 3x ^2 -4 = 8

Mathematics

2 answers:

LenKa [72]3 years ago

5 0

Answer:

x = ±2

Step-by-step explanation:

3x ^2 -4 = 8

Add 4 to each side

3x ^2 -4+4 = 8+4

3x^2 =12

Divide each side by 3

3x^2 =12

3x^2/3 = 12/3

x^2 = 4

Take the square root of each side

sqrt(x^2) = ±sqrt(4)

x = ±2

hodyreva [135]3 years ago

4 0

Answer:

x = 2

Step-by-step explanation:

3x ^2 -4 = 8

3x^2 = 12

3x^2/3 = 12/3

x^2 = 4

Square root 4 is 2

x = 2

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