18x²+12xy+2y²-20=0
2(3x+y)²)-20=
2*8²-20=
2*64-20=
128-20=108
a= 18x² + 12xy + 2y² - 20
a= 2.(3x+y)² -20
a=2.8² -20 = 128-20 = 108
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18x²+12xy+2y²-20=0
2(3x+y)²)-20=
2*8²-20=
2*64-20=
128-20=108
a= 18x² + 12xy + 2y² - 20
a= 2.(3x+y)² -20
a=2.8² -20 = 128-20 = 108