How do you factor 121c^4-264c^2+144?

1 Answer
Jul 19, 2016

=(11c^2 -12)^2

Explanation:

The clues as to what might be happening here lie in the fact that 121 and 144 areboth perfect squares. Checking 264 reveals that it is

11 xx 12 xx 2 which means that this is the answer the square of a binomial.

121c^4 -264 + 144

=(11c^2 -12)^2

Multiplying out will confirm the result.