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(2x + 1)2 − 4x(x − 1) = 7
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(2x + 1)2 − 4x(x − 1) = 7

User Okonomichiyaki
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Answer:


(2x + 1)^(2) - 4x(x - 1) = 7 \\ (2x + 1)(2x + 1) - 4 {x}^(2) + 4x = 7 \\ 4 {x}^(2) + 4x + 1 - 4 {x}^(2) + 4x = 7 \\ 8x + 1 = 7 \\ 8x = 7 - 1 \\ 8x = 6 \\ \\ x = (6)/(8) \\ \\ x = (3)/(4) \\ \\ x = 0.75

User Jules Copeland
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