Question

3xao quadrado+5x=-x-9+2xao quadrado

Answer 1

3x² + 5x = -x - 9 + 2x²

3x² - 2x² + 5x + x + 9 = 0

x² + 6x + 9 = 0

delta = b² - 4.a.c


a = 1
b = 6
c = 9


delta = 6² - 4.1.9
delta = 36 - 36
delta = 0


x = -b ± √delta/2.a



x = -6 ± √0/2.1

x = -6 ± 0/2 = -6/2 = -3


s={ -3 }