55^2*5-45^2*5因式分解
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55^2*5-45^2*5因式分解
55^2*5-45^2*5因式分解
55^2*5-45^2*5因式分解
=5(55²-45²)
=5×(55+45)(55-45)
=5×100×10
=5000
55^2*5-45^2*5因式分解
55^2*5-45^2*5因式分解
55^2*5-45^2*5因式分解
=5(55²-45²)
=5×(55+45)(55-45)
=5×100×10
=5000