nhseir nhseir
  • 16-03-2015
  • Mathematics
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does 4(2x-5) equal 8x-5 or 8x-20? explain

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Аноним Аноним
  • 16-03-2015
4(2x-5)
8x-20

it is equal to 8x-20 because you simplify it and it turns into that.
HOPE I HELPED!!!


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Аноним Аноним
  • 16-03-2015
[tex] 4(2x-5)[/tex] is equal to [tex]8x-20[/tex].

Because, when multiplying an integer with a bracket, you multiply the integer with all the stuff in it.

Like this,

[tex]a(bx+c)=\quad a\cdot bx+b\cdot c[/tex]

So if we expand the expression [tex]4(2x-5)[/tex]

[tex]4(2x-5)=\quad 4\cdot 2x+(4\cdot -5)\quad \Longrightarrow \quad 8x+(-20)\quad \Longrightarrow \quad 8x-20[/tex]
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