Question

X2 +8x+9 =0 bycompleting square root method​

Answer 1

Step-by-step explanation:

${x}^{2} + 8x + 9 = 0 \\ {(x + 3)}^{2} = 0 \: \: \: \: \: ((from \: {x}^{2} + 2xy + {y}^{2} = {(x + y)}^{2} \\ (x + 3)(x + 3) \\ x + 3 = 0 \: \: \: \: \: \: \: \: \: \: x + 3 = 0\\ x = - 3 \: \: \: \: \: \: \: \: \: \: \: \: \: \: x = - 3$

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Answer 2

$\Large\frak{\underline{\underline{Answer:}}}$Step-by-step explanation:

${x}^{2} + 8x + 9 = 0 \\ {(x + 3)}^{2} = 0 \: \: \: \: \: ((from \: {x}^{2} + 2xy + {y}^{2} = {(x + y)}^{2} \\ (x + 3)(x + 3) \\ x + 3 = 0 \: \: \: \: \: \: \: \: \: \: x + 3 = 0\\ x = - 3 \: \: \: \: \: \: \: \: \: \: \: \: \: \: x = - 3$