Respuesta :
Answer:
a) [tex]4\left(3x+2\right)-2=12x+6[/tex]
b) [tex]20b-16= 4\left(5b-4\right)[/tex]
Step-by-step explanation:
a) To simplify the expression you must:
Expand [tex]4(3x + 2)[/tex]:
Apply the distributive law: [tex]\:a\left(b+c\right)=ab+ac[/tex]
[tex]a=4,\:b=3x,\:c=2\\\\4\left(3x+2\right)=4\cdot \:3x+4\cdot \:2[/tex]
Simplify [tex]4\cdot \:3x+4\cdot \:2= 12x+8[/tex]
[tex]12x+8-2[/tex]
Subtract the numbers: [tex]4\left(3x+2\right)-2=12x+6[/tex]
b) To factor the expression [tex]20b - 16[/tex] you must:
Rewrite 16 as [tex]4\cdot 4[/tex] and 20 as [tex]4\cdot 5[/tex]
[tex]20b-16=4\cdot \:5b-4\cdot \:4[/tex]
Factor out common term 4
[tex]20b-16= 4\left(5b-4\right)[/tex]
