Question

expand (4a + 3b - 2c)​

Answer 1

Answer:

(4a+3b-2c)*2

formula (a+b+c)*2

=a*2+b*2+c*2+2ab+2bc+2ca

(4a*2+3b*2+(-2c*2))

(16a*2+9b*2-+4c*2)answer