(adsbygoogle = window.adsbygoogle || []).push({}); 1. show that if a square matrix A satisfies A^3+4A^2 -2A+7i=0 then so does A^T

i is the identity matrix

3. The attempt at a solution

I tried to multiply the equation by A^T but all in vain

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Anyone can prove this ?

**Physics Forums | Science Articles, Homework Help, Discussion**