упростить:
7√28 - √80 - 2√63 + 3√45
7√28=7√7*4=7*2√7=14√7
2√63=2√7*9=6√7
√80=√5*16=4√5
3√45=3√9*5=9√5
7√28 - √80 - 2√63 + 3√45=5√5+8√7
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7√28=7√7*4=7*2√7=14√7
2√63=2√7*9=6√7
√80=√5*16=4√5
3√45=3√9*5=9√5
7√28 - √80 - 2√63 + 3√45=5√5+8√7