Question

(2x+3)²-(2x-1)(2x+1)=34
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Answer 1

Ответ:

$(2x + 3) {}^{2} - (2x - 1)(2x + 1) = 34 \\ 4x {}^{2} + 12x + 9 - 4x {}^{2} + 1 = 34 \\ 12x = 34 - 9 - 1 \\ 12x = 24 \\ x = 24 \div 12 \\ x = 2$