Question

solve by completing the square method:x^2+10x+9=0​

Answer 1

Answer:

${x}^{2} + 9x + x + 9 = 0 \\ x(x + 9) + 1(x + 9) = 0 \\ \\ (x + 1)(x + 9) = 0 \\ \\ x = - 1 \\ x = - 9$

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