계산 (4X ^ 2 - 25y ^ 2) 제외 (2x - 5y) (2) (2x ^ 2 - 2x + 1 \ 2) 제외 (x - 1 \ 2) 방정식 을 풀다 (3y + 5) ^ 2 = 4y ^ 2

계산 (4X ^ 2 - 25y ^ 2) 제외 (2x - 5y) (2) (2x ^ 2 - 2x + 1 \ 2) 제외 (x - 1 \ 2) 방정식 을 풀다 (3y + 5) ^ 2 = 4y ^ 2

1. (4x ^ 2 - 25y ^ 2) / (2x x - 5y) = (2x x + 5y) (2x x x x - 5y) / (2x x x x x - 5y) = 2x + 5y 2. (2x ^ 2 2 - 2x x + 1 (2 x x x x x x x - 1 / 5) / (2x x x x x x - 5 (x x - 1 / 2) ^ 2 / (x x - 1 / 2) = 2 (x x - 1 / 2) = 2 (x x - 1 / 2 / 2) = 2x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x y ^ 2 9 y ^ 2 + 30y + 25 = 4y ^ 2 5 y ^ 2 + 30y + 25 = 0 y ^ 2 + 6 y + 5 = 0 (y + 1) (y + 5) = 0 y = - 1 또는 y = - 5