Question

4x2-196=0
Es 4al cuadrado

Answer 1

$4x^{2}-196 = 0\\\\\\4x^{2}  = 196\\\\\\x^{2} = \frac{196}{4} \\x^{2} = 49\\\\\sqrt{x^{2} } = \sqrt{49} \\x = +/- 7\\\\CS = ( -7 ; 7 )$