Question

11a square -5b square + 12c from 15a square +7b square -3c subtract it. ​

Answer 1

$15a {}^{2} + 7b {}^{2} - 3c \: - \: 11a {}^{2} - 5b { }^{2} + 12c$

$4a {}^{2} + 2b {}^{2} - 9c$

⬆️⬆️ That is answer hope it's helpful to you