Question

Simplifiquem as expressões
$(x + 5) ^{2} - x(x + 3)$
$(2x - 1)^{2} + x(3x - 2)$
$x(x - 1) ^{2} +x ^{2} (x + 3)$
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Answer 1

Oie, Td Bom?!

>>> Resolvendo as expressões.

I.

$(x + 5) {}^{2} - x \: . \: (x + 3)$

$x {}^{2} + 10x + 25 - x {}^{2} - 3x$

$7x + 25$

II.

$(2x - 1) {}^{2} + x \: . \: (3x - 2)$

$4x {}^{2} - 4x + 1 + 3x {}^{2} - 2x$

$7x {}^{2} - 6x + 1$

III.

$x \: . \: (x - 1) {}^{2} + x {}^{2} \: . \: (x + 3)$

$x \: . \: (x {}^{2} - 2x + 1) + x {}^{3} + 3x {}^{2}$

$x {}^{3} - 2x {}^{2} + x + x {}^{3} + 3x {}^{2}$

$2x {}^{3} + x {}^{2} + x$

Att. Makaveli1996