zadania w zalaczniku BARDZO PROSZE O POMOC wiem ze troche ich jest ale bede wdzieczna za kazda pomoc:(
w zalacz. 0219 bez zad 4
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Zad. 3 Doprowadź do najprostrzej postaci :
(2x-5)^{2} - (x - 3 )(x + 3) = 4x^{2} + 25 - x^{2} +3x - 3x - 3 = 4x^{2} - x^{2} + 22 = 3x^{2} +22
(x+2)^{3} - (3x -1 )^{2} = x^{3} +8 - 9x^{2}-1 = x^{3} +7 -9x^{2}
Rozłóż czynniki :
7x^{2} - 7 = 7(x^{2} - 1)
a^{2} + 3ab + 3 a +6b = a (1^{2} + 3b + 3 = 6b
12.-3x - 2y + 5
13.18x-y+7
14.-12a - 20
15.1
15.-8x - 6y - 4