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16.06.2020 •
Mathematics
Solve for x. 3x ^2 -4 = 8
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Ответ:
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
Ответ:
x = 2
Step-by-step explanation:
3x ^2 -4 = 8
+4
3x^2 = 12
3x^2/3 = 12/3
x^2 = 4
Square root 4 is 2
x = 2
Ответ: