6x⁴-8x³-4x² (a-3)²-(2a-6) 16a²b²-9 2xy-x²-y² 1/4+(a-b)+(a-b)²
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6x⁴-8x³-4x² (a-3)²-(2a-6) 16a²b²-9 2xy-x²-y² 1/4+(a-b)+(a-b)²
6x⁴-8x³-4x² (a-3)²-(2a-6) 16a²b²-9 2xy-x²-y² 1/4+(a-b)+(a-b)²
6x⁴-8x³-4x² (a-3)²-(2a-6) 16a²b²-9 2xy-x²-y² 1/4+(a-b)+(a-b)²
6x⁴-8x³-4x²
=2x²(3x²-4x-2)
(a-3)²-(2a-6)
=a²+9-6a-2a+6
=a²-8a+15
=(a-3)(a-5)
16a²b²-9
=(4ab+3)(4ab-3)
2xy-x²-y²
=-(x-y)²
1/4+(a-b)+(a-b)²
=(a-b+1/2)²
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