Question

Me ajudemmm por favor ...

Answer 1

Resposta:

não sei também blz ksks

Answer 2

Explicação passo-a-passo:

$d)\left[\begin{array}{ccc}3&2\\9&7\\\end{array}\right]+\left[\begin{array}{ccc}10&4\\5&8\\\end{array}\right]+\left[\begin{array}{ccc}25&17\\18&-20\\\end{array}\right]-\left[\begin{array}{ccc}10&5\\9&2\\\end{array}\right]$

   some/subtraia os elementos correspondentes

   $\left[\begin{array}{ccc}3+10+25-10&2+4+17-5\\9+5+18-9&7+8+(-20)-2\\\end{array}\right]=\left[\begin{array}{ccc}28&18\\23&-7\\\end{array}\right]$

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$e)\left[\begin{array}{ccc}0&1\\3&4\\\end{array}\right]-\left[\begin{array}{ccc}5&1\\1&3\\\end{array}\right]+\left[\begin{array}{ccc}9&0\\2&1\\\end{array}\right]$

   subtraia/some os elementos correspondentes

   $\left[\begin{array}{ccc}0-5+9&1-1+0\\3-1+2&4-3+1\\\end{array}\right]=\left[\begin{array}{ccc}4&0\\4&2\\\end{array}\right]$