This textbook survival guide was created for the textbook: Differential Equations, edition: 4. Since the solution to 18 from 7.5 chapter was answered, more than 215 students have viewed the full step-by-step answer. The answer to “Consider the general 2 2 real symmetric matrix A = a b b c . Prove that A has an eigenvalue of multiplicity two if and only if it is a scalar matrix (that is, a matrix of the form r I2, where r is a constant). 1” is broken down into a number of easy to follow steps, and 48 words. The full step-by-step solution to problem: 18 from chapter: 7.5 was answered by , our top Math solution expert on 03/13/18, 06:45PM. This full solution covers the following key subjects: . This expansive textbook survival guide covers 91 chapters, and 2967 solutions. Differential Equations was written by and is associated to the ISBN: 9780321964670.