doprowadź do naprostszej postaci :
a. ( 5 -5a ) ( 5 +5a ) + ( 5 - 5a do kwadratu )
b. (4a - 1 ) do kwadratu - (4a + 1 ) do kwadratu.
zadanie na jutro. ; D
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a. 25 - 25a^2+ (5-5a^2) = 30 - 30a^2
b. 4a^2 - 8a + 1 - (4a^2 + 8a + 1) = 4a^2 -8a+1 - 4a^2 - 8a -1 = -16a
Uzyte wzory skróconego mnożenia:
a. (a+b)(a-b) = a^2 - b^2
b. (a+b)^2 = a^2 + 2ab + b^2
(a-b)^2 = a^2 - 2ab + b^2