Question

Find the sum
$(5a { }^{2} +7ab - 3b {}^{2} ) + (3a {}^{2} - ab - 6b {}^{2})$

possible answers:
A:
$2a {}^{2} + 8ab + 3b {}^{2}$
B:
$8a {}^{2} + 7ab - 3b {}^{2}$
C:
$8a {}^{2} + 6ab - 9b {}^{2}$
D:
$12a {}^{2} + 2ab - 9b {}^{2}$​

Answer 1

C
Let me know if it’s right!!