Question

2x² + 3 = 39 extracring square roots

Answer 1

Answer:

x = ± 3$\sqrt{2}$

Step-by-step explanation:

2x² + 3 = 39 ( subtract 3 from both sides )

2x² = 36 ( divide both sides by 2 )

x² = 18 ( take square root of both sides )

x = ± $\sqrt{18}$ = ± $\sqrt{9(2)}$ = ± ( $\sqrt{9}$ × $\sqrt{2}$ ) = ± 3$\sqrt{2}$

Answer 2

Answer:

x=9

Step-by-step explanation:

first, subtract 3 from both sides so 2x^2=36, then, divide both sides by 2 so x^2=18 and divide 18 by 2 and 9^2=18