Решить уравнение : (x+2)^2-49=0
x^2+4x+4-49=0
x^2+4x-35=0
D=16+180=196
x=(-4-14)/2=-9
x=(-4+14)/2=5
(x+2)^2-49=0
x2 + 4x - 45 = 0 D = b2 - 4ac D = 16 + 180 = 196 = 14^2
x1,2 = -b ± √D/2a x1 = -4 + 14/2= 10/2= 5 x2 = -4 - 14/2 = - 18/2 = -9 Ответ: x1 = 5; x2 = -9