Question

Va rog ajutatima,nu-i neaparat la toate,dau coronita!
x2-16=0;
t2-25=0;
4x2+4x+1=0;
5x2-7x+2=0;
x2-2x+1=0;
x2-8x+12=0

Answer 1

1) x2-16=0
x2=16
x = [tex] \sqrt{16} =4 [/tex]

2) t2-25=0
t2=25
t=$\sqrt{25} = 5$

3) 4x2+4x+1=0
a = 4 ; b=4;  c=1
discriminanta = $b^{2} - 4 ac$ = $4^{2}$ - 4*4*1= 16-16=0
$- \frac{b}{2a}$ = $- \frac{4}{2*4} = - \frac{4}{8} = - \frac{1}{2}$