Question

HELP!!!
Find the exact solution of x. 3x2 + 7 = 28

Answer 1

2.65 I think I am not sure but the solution

Explanation:

3x² = 28 - 7

3x² = 21

x² = 7

x = 2.65

Answer 2

x = ±
`√(7)`

Explanation:

Given

3x² + 7 = 28 ( subtract 7 from both sides )

3x² = 21 ( divide both sides by 3 )

x² = 7 ( take the square root of both sides )

x = ±
`√(7)`