Question

Add : 11a^2+8b^2-9c^2,5b^2+3c^2-4a^2 and 3a^2-4b^2-4c^2

Answer 1

Step-by-step explanation:

$= 11a {}^{2} + 8b {}^{2} - 9c {}^{2} + 5b {}^{2} + 3c {}^{2} - 4a {}^{2} + 3a {}^{2} - 4b {}^{2} - 4c {}^{2} \\ = 10a {}^{2} + 9b {}^{2} - 17c {}^{2}$

Answer 2

$10a {}^{2} + 9b { }^{2} - 10c {}^{2}$