Question

DAU COROANA !!
Indicati coeficientii a,b si termenul liber c ai ecuatiei:
a)8x-x²+2=0
b)7x² -1 = 0
c)4x² +x + √5-2 = 0

Answer 1

a)8x(a)-x²(b)+2(c)=0
b)7x²(a) -1(c) = 0
c)4x²(a) +x (b)+ √5-2(c) = 0
Succes

Answer 2

2+8x-x²=-(x²-8x+4)+6=6-(x-2)²=(√3)²-(x-2)²=(√3-x+2)(√3+x-2)=0
=> x=2+√3; x=2-√3

7x²-1=(√7x-1)(√7+1)=0 => x=(√7/7) si x=-(√7/7)