Question

3x²- 4=8 please explain

Answer 1

$3 {x}^{2} - 4 = 8 \\ 3 {x}^{2} = 8 + 4 \\ 3 {x}^{2} = 12 \\ {x}^{2} = 12 \div 3 \\ {x}^{2} = 4 \\ x = \sqrt{4} \\ x = 2$
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Answer 2

your given equation

3x²-4 =8

3x² = 4+ 8

3x² = 12

x² = 4

x=√4

x=±2

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