Delta phải có dạng như thế nào để nghiệm là số vô tỉ?

(b) x″ + 8x′ + 7x = f(t), where f(t) = F0 cos(𝜔t). 9.2. Do ... (d) x′ = (2 − x)3. 12.2. Consider y′ = y(y−a−1)(y−2a), where a ... Feb 22, 2021 ... Explanation ... By inspection, the equation is a perfect square trinomial. ... By inspection, the middle term's coefficient 8 is twice the square ... Jun 1, 2006 ... Let's divide both sides of the equation by 4: x² + 2x - 4 = 0. Now, you can use the quadratic formula with a = 1, b = 2, and c = -4. x2 +2= A(x + 1)(x + 2) + Bx(x + 2) + Cx(x + 1). Expanding gives: x2 +2=(A + ... 16 < 0). Completing the square gives x2 + 4x + 4 − 4+8=(x + 2)2 + 4. 3 ... By providing cost effective media streaming and repository services, NJVID enables institutions to overcome the technical barriers in digitizing and making ... Sep 13, 2018 ... 16'0 Touring LTD Inflatable 16'0 x 28.75 x 6 CHF 1'549.– / € 1'399 ... 7'2 Wave Carbon 7'2 x 24 x 3.3 CHF 1'749.– / € 1'599.– Art ... Oct 1, 2022 ... Write the equation of the parabola in standard form, and identify the vertex and the focus. x2−8x−16y−16=0 (x−4)2=16(y+2) vertex: (−4,2); ... Sep 11, 2001 ... Average: 6.5x. 1. Adjusted for the capitalization of operating leases including 55% of wet lease (7x). 2. Adjusted by the portion of financial ... Nov 10, 2014 ... Since |-4| = |4| = 4, we know that |x| = 4; this statement is sufficient. (2) SUFFICIENT: x2 = 8x – 16 x2 – 8x + 16 = 0 (x – 4)2 = 0 We can now square root both sides to give: x+4=0. Now subtracting 4 from both sides gives x=-4. This means that for x^2+8x+16=0 we have found that x=-4.