Question

Solve for a.

Answer 1

\[\sqrt{5a+2}-\sqrt{7a}-8=0\]

Answer 2

What is the root? If there is no root, choose none.

Answer 3

answers
-5
5/6
5
none

Answer 4

if you have answers to choose from, try them out

Answer 5

i need help with solving it

Answer 6

Square both sides of equation

Answer 7

\[5a+2+7a-2\sqrt{5a+2}\sqrt{7a}=64\]

Answer 8

rearrange ........
\[(12a-62)^2=4(5a+2)(7a)\]

Answer 9

ok then one more question what does the root mean

Answer 10

It means when u put the solution in original equation u mest see that all the roots exist

Answer 11

ok and how do i do this

Answer 12

just put back solution fount from the qaudratic in original eq to see it all square roots are real;

Answer 13

ok

Answer 14

so then that rules out none

Answer 15

so that means it has to be..5

Answer 16

?

Answer 17

no 5/6

Answer 18

Perhaps the simplest way to solve this was with the initial suggestion.. you have answers just try them out..

Answer 19

ok

Answer 20

help?