Question

Помогите((
1)2с(а-3b+4)
2) (2а-1) (3х-2)
3) 7+2х^2=2(х+1) (х+3)

Answer 1

1)2ас-6bc+8c
2)6ax-4a-3x+2
3)7+2x^2=2(x^2+3x+x+3)
7+2x^2-2x^2-6x-2x-6=0
-8x+1=0
-8x=-1
x=0,125