Question

algm me ajuda pfv

(x-4)2 + (x-2)2 + 12x

(5x - 6)2 - 18(x2 - 2)

Answer 1

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$\sf{(x-4)^2+(x-2)^2+12x}\\\sf{x^2-8x+16+x^2-4x+4+12x=2x^2+20}\\\sf{(5x-6)^2-18(x^2-2)}\\\sf{25x^2-60x+36-18x^2+36}\\\sf{7x^2-60x+72}$

Answer 2

Oie, Td Bom?!

I.

$= (x - 4) {}^{2} + (x - 2) {}^{2} + 12x$

$= x {}^{2} - 2x \: . \: 4 + 4 {}^{2} + x {}^{2} - 2x \: . \: 2 + 2 {}^{2} + 12x$

$= x {}^{2} - 8x + 16 + x {}^{2} - 4x + 4 + 12x$

$= 2 x{}^{2} + 0 + 20$

$= 2x {}^{2} + 20$

II.

$= (5x - 6) {}^{2} - 18(x {}^{2} - 2)$

$= (5x) {}^{2} - 2 \: . \: 5x \: . \: 6 + 6 {}^{2} - 18x {}^{2} - 18 \: . \: ( - 2)$

$= 25x {}^{2} - 60x + 36 - 18x {}^{2} + 36$

$= 7x {}^{2} - 60x + 72$

Att. Makaveli1996