Question

2x ² -4 =28 ayuda por favor :)

Answer 1

x=4

$2x { }^{2} - 4 = 28$

$2x {}^{2} = 38 + 4 = 32$

$x {}^{2} = 32 \div 2 = 16$

$x = \sqrt{16 } = 4$

espero haberte ayudado : )

x=4