Question

A) X2 +3X-10=0
B) X2 -3X-4=0
C) -X2 -4X-2=0
D) (X+2)2 +1=0
E) (X-3)2-4=0
F) -0,5X2 +2X+1,5=0 G) -2Y2 -Y= -6
H) 1,5X2 + 2X = 0
I) (X+2)(X–3)=6 J) (X+1)(X-5)=16

Answer 1

X² + 3X - 10 = 0

X           + 5

X           - 2

5X  - 2X  =3X

(X+5)(X-2) = 0

X + 5 = 0       X - 2 = 0

X = -5           X = 2

CS = (-5; 2)

X² - 3X - 4 = 0

X           - 4

X           + 1

-4X + X = -3X

(X - 4)(X + 1) = 0

X -  4 = 0    X + 1 = 0

X = 4         X = -1  

CS = (-1 ; 4)

Eternamente axllxa