\( \gamma \) and 5 are substracted and added respectively from a positive number. The produce of the rwo news numbers obtoined is 140 Find the number
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Let's denote the positive number as \( x \). According to the problem, when \( \gamma \) is subtracted from \( x \), the new number is \( x - \gamma \). When 5 is added to \( x \), the new number is \( x + 5 \). The product of these two new numbers is given as 140, which leads us to the equation: \[ (x - \gamma)(x + 5) = 140 \] Now, let's simplify the left-hand side: \[ x^2 + 5x - \gamma x - 5\gamma = 140 \] Rearranging gives us the equation: \[ x^2 + (5 - \gamma)x - 5\gamma - 140 = 0 \] This is a quadratic equation in the standard form \( ax^2 + bx + c = 0 \). The specific values for \( \gamma \) would be necessary to solve for \( x \). Let's assume \( \gamma = 3 \) just for calculation: \[ x^2 + (5 - 3)x - 5(3) - 140 = 0 \] \[ x^2 + 2x - 15 - 140 = 0 \] \[ x^2 + 2x - 155 = 0 \] Now we can solve for \( x \) using the quadratic formula: \[ x = \frac{{-b \pm \sqrt{{b^2 - 4ac}}}}{2a} \] Substituting \( a = 1, b = 2, c = -155 \): \[ x = \frac{{-2 \pm \sqrt{{2^2 - 4(1)(-155)}}}}{2(1)} \] \[ x = \frac{{-2 \pm \sqrt{{4 + 620}}}}{2} \] \[ x = \frac{{-2 \pm \sqrt{624}}}{2} \] \[ x = \frac{{-2 \pm 24.98}}{2} \] Calculating the two possible \( x \) values yields \( x \approx 11.49 \) or \( x \approx -13.49 \). Since \( x \) must be positive, we find: \[ x \approx 11.49 \] Thus, the positive number is approximately 11.49. Would you like to explore any specific value for \( \gamma \) or another approach entirely?