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OpenStudy (anonymous):
what is the exact value of the expression 8 square root 15+5 square root 5+ square root 15 ?
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OpenStudy (lgbasallote):
think of sqrt 15 as x....what is 8x + x?
OpenStudy (anonymous):
9x?
OpenStudy (lgbasallote):
righ.. so what's 8 sqrt 15 + sqrt 15?
OpenStudy (anonymous):
wait I'm confused so I'd add 9x+8x?
OpenStudy (lgbasallote):
noo...8x + x = 9x right?
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OpenStudy (lgbasallote):
now just think of sqrt 15 as x so what is the value for 8 sqrt 15 + sqrt 15?
OpenStudy (anonymous):
square root 23x ?
OpenStudy (lgbasallote):
no.. hint: sqrt 3+ sqr 3 = 2 sqrt 3 sqrt 5 + 2 sqrt 5 = 3 sqrt 5 do you get it ow?
OpenStudy (lgbasallote):
now*
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