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Cristina3107
a fost răspuns

Efectuati calculele:
a)(2x-1)²
b)(x+[tex] \sqrt{3} [/tex])²
c)(a²-a+2)²
d)(2x-7)(2x+7)
e)(a-2b)²

Răspuns :

Mihaelap
a) (2x - 1)² = 4x² - 4x + 1
b) (x + √3)² = x² + 2√3x + √9 = x² + 2√3x + 3
c) (a² - a + 2)² = a⁴ - 2a³ + 5a² - 4a + 4
d) (2x - 7)(2x + 7) = 4x² - 49
e) (a - 2b)² = a² - 4ab + b²

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