3 years ago

Help on this question, please

Mathematics

1 answer:

qwelly [4]3 years ago

5 0

Answer:

x = ±sqrt(7)

Step-by-step explanation:

3x^2 + 7 = 28

Subtract 7 from each side

3x^2 + 7-7 = 28-7

3x^2 = 21

Divide by 3

3x^2 /3 = 21/3

x^2 = 7

Take the square root of each side

sqrt(x^2) = ±sqrt(7)

x = ±sqrt(7)

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