Question

(x+2)•x-(x+3)•(x-3)=13 помогите пожалуйста

Answer 1

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Answer 2

${x}^{2} + 2x - ( {x}^{2} - 9) = 13 \\ {x}^{2} + 2x - {x}^{2} + 9 = 13 \\ 2x + 9 = 13 \\ 2x = 13 - 9 \\ 2x = 4 \\ x = 2$