Question

solve the given equation by the method of completing squares x^2+12x_45=0​

Answer 1

$x ^{2} +12x - 45 = 0 \\ x {}^{2} + 12x = 45 \\ x {}^{2} + 12x + {6}^{2} = 45 + 6 {}^{2} \\ {x+6} = \sqrt{45 + 36 } \\x + 6 = \sqrt{81 } \\ x + 6 = 9 \\ x = 3 \\ x + 6 = - 9 \\ x = - 15$
this is the ans

Answer 2

above solution is the right