devourmepls
Answered

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4(a2 + 2b) - 2b when a = 2 and b = –2.

Sagot :

beinggreat78

Answer:

4

Keys:

  • [tex]a \cdot (-b) = -a \cdot b[/tex]
  • [tex]-\left(-a\right)=+a[/tex]

Step-by-step explanation:

[tex]4\left(\left(2\right)\cdot \:2+2\left(-2\right)\right)-2\left(-2\right)\\\left(2\right)\cdot \:2+2\left(-2\right)\\=4+2\left(-2\right)\\=4-4\\=0[/tex]

[tex]=4\cdot \:0-2\left(-2\right)\\4\cdot \:0\\=0\\=0-2\left(-2\right)[/tex]

[tex]2\left(-2\right)\\=-4\\=0-\left(-4\right)[/tex]

[tex]0-\left(-4\right)\\=0+4\\=4[/tex]

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