x1 = -1 ; x2 = 3
Объяснение:
x^2 + 4x + 4 = 6x + 7
x^2 + 4x + 4 - 6x - 7 = 0
x^2 - 2x - 3 = 0
D = b^2 - 4ac = 4 - 4 × 1 × (-3) = 4 + 12 = 16
x1,2 = -b + корень16 / 2a = 2 +- 4 / 2
x1 = -1
x2 = 3
