已知括号M加6分之5M减4括号的平方加N-1分之N加3的绝对值=0,求代数式5M-1分之2-2N

∵ [ (5M-4) / (M+6) ]^2 ≥ 0 ,| (N+3) / (N-1) | ≥ 0又：[ (5M-4) / (M+6) ]^2 + | (N+3) / (N-1) | = 0∴ [ (5M-4) / (M+6) ]^2 = 0 ,| (N+3) / (N-1) | = 0∴ 5M-4 = 0,N+3 = 0∴ M = 4/5,N = -3(2-2N) / (5M-1...