Question

resolva a equação 

5 x^{2} +4=49

Answer 1

5$x^{2}$= 49 - 4
5$x^{2}$= 45
$x^{2}$= 45/ 5
$x^{2}$= 9

Answer 2

5x²+4=49
5x²=49-4
5x²=45
x²=45/5
x²=9
x=$\sqrt{9}$
x= $\pm 3$