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radicals! this says simplify...

radicals! this says simplify by factoring √80a^2b ??

then this says subtract and simplify 5√18-4√2 ???

and then simplify 5

√-1/1024 the 5 is index I think it is little # XXXXX on radical sign ???

and yet again simplify (2√7 - 4√3)(5√7 + 10√3)

I just do not understand, they all look so different to me! yet they all say simplify! :(

then this says subtract and simplify 5√18-4√2 ???

and then simplify 5

√-1/1024 the 5 is index I think it is little # XXXXX on radical sign ???

and yet again simplify (2√7 - 4√3)(5√7 + 10√3)

I just do not understand, they all look so different to me! yet they all say simplify! :(

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