Question

$(y - 2)(y + 3) - (y - 2) ^{2} = 5$
найти "y"
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Answer 1

$(y - 2)(y + 3) - {(y - 2)}^{2} = 5$

${y}^{2} + 3y - 2y - 6 - {y}^{2} + 4y - 4 = 5$

$5y - 10 = 5$

$5y = 15$

$y = 3$