Question

$a) \: (x - 3){}^{2} +(x + 1) {}^{2} - (2x + 1)(2x - 1)$
$b) \: (2x + 5) {}^{2} - (3x - 5) {}^{2} + (2x + 7)(2x - 7)$
$c) \: (x + 4) {}^{2} - (2x - 3)(2x + 3) + (2x + 1) {}^{2}$
$d) \: (2x + 3) {}^{2} - 2(x - 3)(x + 3) + (x - 6)(x + 6) - (2x - 1) {}^{2}$
$e) \: (3x - 1)(3x + 1) - (3x + 4) {}^{2} + 2(3x - 1) {}^{2}$
$f) \: (3 - 2x) {}^{2} - (2x + 5)(2x - 5) + 4(x - 2) {}^{2}$
$g) \: (4x - 3) {}^{2} - 3(x - 1)(x + 1) - 2(2x - 7) {}^{2}$
am urgent nevoie! ofer coroana☺


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Answer 1

Trebuie doar sa calculezi folosind formulele de calcul prescurtat:
(a+b) ²= a ² + 2ab + b ² sau (a-b) ²= a ² - 2ab + b ²
(a-b)(a+b)=a ²-b ²