Calculate the square of (a-2b-3) given a + B = 6, ab = 8, find: (1) the square of a + the square of B (2) (a-b)

Calculate the square of (a-2b-3) given a + B = 6, ab = 8, find: (1) the square of a + the square of B (2) (a-b)

If a and B are two roots of the equation x ^ 2-6x + 8 = 0, then a = 2, B = 4 or a = 4, B = 2
(a-2b-3) ^ 2 = 81 or 9
a^2+b^2=(a+b)^2-2ab=36-16=20
(a-b)^2=(a+b)^2-4ab=36-32=4

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