hello, I am needing some help here! I am confused on how to do these questions... can y'all please help?
(a) Simplify the expression and explain each step. 4(3x+2) -2
(b) Factor the expression completely. 20b - 16
4(3x+2) -2
Multiply the terms in parentheses by 4.
12x + 8 - 2
Combine like terms
12x + 6
4(3x+2) -2
first distributive property
12 x + 8 - 2
then combine like terms
12 x + 6
==============
20b - 16
well 20 = 4*5 and 16 = 4*4
so
4*5*b - 4*4
reverse that distributive property trick now to take out greatest common factor
4 ( 5 b - 4)
You are welcome.
4 ( 5 b - 4)
but of course 4 is not prime
2*2 (5 b - 2*2)