6) а^4-b^6
(a²-b³)(a²+b³)
7)0,01c^2-d^8
(0.1c-d⁴)(0.1c+d⁴)
8)0,81y^10-400z^12
(0.9y⁵-20z⁶)(0.9y⁵+20z⁶)
9)-1+49a^4b^8
(1+7a²b⁴)(-1+7a²b⁴)
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6) а^4-b^6
(a²-b³)(a²+b³)
7)0,01c^2-d^8
(0.1c-d⁴)(0.1c+d⁴)
8)0,81y^10-400z^12
(0.9y⁵-20z⁶)(0.9y⁵+20z⁶)
9)-1+49a^4b^8
(1+7a²b⁴)(-1+7a²b⁴)