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z tw. Pitagorasa=>
(1/2a)^2 + w^2 = a^2
1/4a^2 + 3*= a^2
1/4a^2 - a^2 = -3
-3/4a^2 = 3- / (-4/3)
a^2 = 12/3
a^2 = 4
a=2
b)
z tw. pitagorasa =>
1/4a^2 + 12 = a^2
1/4 - a^2 = - 12
-3/4a^2 = -12/ (-4/3)
a^2 = 16
a = 4
c)
1/4a^2 + 36 =a^2
-3/4a^2 = -36 / (-4/3)
a^2 = 48
a= 2 pierwiastków z 12
d)
1/4a^2 + 2,25 = a^2
-3/4a^2 = -9/4 / (-4/3)
a^2 = 36/12
a = pierwiastek z 3
* 3 bo pierwiastek z trzech do kwadratu jest 3:)