Question

Resolver los siguientes ejercicios xfs​

Answer 1

te respondería si no tuviera esa foto tan...

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Answer 2

Explicación paso a paso:

1.-

a)

${(7 - 3)}^{2} \times 5 \div 4 - {2}^{2} \\ = {4}^{2} \times 5 \div 4 - 4 \\ = 16 \times 5 \div 0 \\ = 80 \div 0 = 0$

b)

$(7 - 3) \times {5}^{2} \div {(4 - 2)}^{2} \\ = 4 \times 25 \div {2}^{2} \\ = 100 \div 4 = 25$

2.-

a)

$2(x + 1) - 3(x - 2) = x - 6 \\ (2x + 2) - (3x - 6) = x - 6 \\ 2x + 2 - 3x + 6 = x - 6 \\ - x + 8 = x - 6 \\ 8 + 6 = x + x \\ 14 = 2x \\ 7 = x$

b)

$3x - 1 - (x - 4) - (2(x - 3) - 3(1 - 2x)) = - x - 2 \\ 3x - 1 - x + 4 - (2x - 6 - 3 + 6x) = - x - 2 \\ 2x + 3 - (8x - 9) = - x - 2 \\ - 6x + 12 = - x - 2 \\ 12 + 2 = - x + 6x \\ 14 = 5x \\ \frac{14}{5} = x$

3.-

a)

$\sqrt{ {13}^{2} - {12}^{2} } + {(6 - 4)}^{2} \times 8 - \sqrt{ {(10 - 8)}^{2} } \\ \sqrt{169 - 144} + {2}^{2} \times 8 - \sqrt{ {2}^{2} } \\ \sqrt{25} + 4 \times 8 - \sqrt{4} \\ 5 + 4 \times 8 - 2 \\ 5 + 32 - 2 \\ 35$

b)

$2 + (8 \times (8 - 6) + ((3 + 4) \div 7 - 5 \times 6 \div 10) - 5) \\ 2 + (8 \times 2 + (7 \div 7 - 30 \div 10) - 5) \\ 2 + (16 + (1 - 3) - 5) \\ 2 + (16 + ( - 2) - 5) \\ 2 + (16 - 2 - 5) \\ 2 + 9 \\ 11$