Question

what is the exact value of the expression 8 square root 15+5 square root 5+ square root 15 ?

Answer 1

think of sqrt 15 as x....what is 8x + x?

Answer 2

9x?

Answer 3

righ.. so what's 8 sqrt 15 + sqrt 15?

Answer 4

wait I'm confused so I'd add 9x+8x?

Answer 5

noo...8x + x = 9x right?

Answer 6

now just think of sqrt 15 as x

so what is the value for 8 sqrt 15 + sqrt 15?

Answer 7

square root 23x ?

Answer 8

no..
hint:

sqrt 3+ sqr 3 = 2 sqrt 3

sqrt 5 + 2 sqrt 5 = 3 sqrt 5

do you get it ow?

Answer 9

now*