Question

rezolvați ecuati(x+2) la a doua -9=0

Answer 1

x^2 +4x +4 -9 = 0
x^2 +4x -5 = 0
Delta = 16 +20
Delta = 36
x1= (-4+6)/2
x1= 2/2 = 1
x2= (-4-6)/2
x2= -10/2 = -5

Answer 2

Rezolvare : (x+2)²–9=0; x²+4x+4–9=0; x²+4x–6=0; ∆=b²–4ac; ∆=16–4×(–6); ∆=16+24; ∆=40; √∆=√40=2√10; x1=–b+√∆ supra 2a; x1=–4+2√10 supra 2; x1=–2(2–√10) supra 2; x1=2–√10; x2=+b+√∆ supra 2a; x2=4+2√10 supra 2; x2=2(2+√10) supra 2; x2=2+√10;