12x-(x+6)²= 12x-x²-12x-36= -x²-36= -(x²+36)
(2x-3y)²+(4x+2y)²= 4x²-12xy+9y²+16x²+16xy+4y²= 20x²+4xy+13y²
(x-5)²-x(x+3)= x²-10x+25-x²-3x= 25-13x
a⁸-x¹⁰= (a⁴-x⁵)(a⁴+x⁵)
0,04b⁴-a¹²=(0,2b²-a⁶)(0,2b²+a⁶)
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12x-(x+6)²= 12x-x²-12x-36= -x²-36= -(x²+36)
(2x-3y)²+(4x+2y)²= 4x²-12xy+9y²+16x²+16xy+4y²= 20x²+4xy+13y²
(x-5)²-x(x+3)= x²-10x+25-x²-3x= 25-13x
a⁸-x¹⁰= (a⁴-x⁵)(a⁴+x⁵)
0,04b⁴-a¹²=(0,2b²-a⁶)(0,2b²+a⁶)