radical expressions help : 7√125+8√180=?

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please show me how to do one of these: 7√125+8√180=

2007-09-03 15:53:34 · 2 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics

I assume you want to simplfy the expression?

7√125 + 8√180

= 7√(25*5) + 8√(36*5)

= 7√(5² * 5) + 8√(6² * 5)

= 7*5√5 + 8*6√5

= 35√5 + 48√5 = 83√5

2007-09-03 16:27:45 · answer #1 · answered by Northstar 7 · 0⤊ 0⤋

V125 = 11.180 x 7 = ~78.3
V180 = 13.410 x 8 = ~ 107.3
78.3 +107.3 = 185.6

2007-09-03 16:34:33 · answer #2 · answered by Freesia 5 · 0⤊ 0⤋