Question

4=$x^{2}$

Answer 1

Oi

x² = 4

x1 = -2
x2 = 2

.

Answer 2

=1 
B=0 
C=-4 

Delta=b²-4*A*C 
Delta= 0²-4*1*-4 
Delta=16 

X= -0+ou-4/2 

X'=4/2=2 
X''=-4/2=-2