Answer
a) There are 2 solutions: $4$, $-4$
b) No Real Number Solutions
c) There is 1 solution: $0$
Work Step by Step
Use the graphs of
$y = x^2-16$
$y = 3x^2 +6$
$y = x^2 - 25$
and locate where the equations in the problem are true. In the image below, the points are pinpointed.
