Question

Jika a=2 , b=-3 ,dan c=-1 maka 3a(pangkat 2) + 2ab - 3b(pangkat 2)c
adalah ??


tolong dibantu ya ....

Answer 1

=3a^2+2ab-3b^2c
=3(2)^2 + 2(2)(-3) - 3(-3)^2(-1)
=(3*4) + (-12) - (27)
=12-12 + 27
=27

Answer 2

3a² + 2ab - 3bc
= 3 x (2)² + 2 x 2 x (-3) - 3 x (-3)² x (-1)
= 3 x 4 - 12 - 3 x 9 x (-1)
= 12 - 12 + 27
= 27