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4( x - 1)² = 12x + 3
4( x² - 2x + 1) = 12x + 3
4x² - 8x + 4 = 12x + 3
4x² - 8x - 12x + 4 - 3 = 0
4x² - 20x + 1 = 0
D = b² - 4ac = 400 - 4×4 = 400 - 16 = 384
x1,2 = ( 20 +/- √384) / 8
S6= b1*(g в 6степени -1)/g-1= -3/4*(2 в 6 степени-1)/2-1= -31,5
Х²-16х+64-64+6b= x²-16x+6b