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Old 07-26-2007   #3
fofo m
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1)x^2 – 14x + 49=x^2 -7x -7x + 49=x(x-7)-7(x-7)=(x-7)(x-7)E2)4x^4 – 20x^2 + 25=4x^4 - 10x^2 - 10x^2 + 25=2x^2(2x^2-5) - 5(2x^2-5)=(2x^2-5)(2x^2-5)D
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