SOLUTION: Solve the equation for ALL solutions.
Squareroot(2D-3)=D-9
I'm a little confused, I came up with D=14 but also show D=6 & 14. Not sure which is correct on my homework these are b
Algebra.Com
Question 191206: Solve the equation for ALL solutions.
Squareroot(2D-3)=D-9
I'm a little confused, I came up with D=14 but also show D=6 & 14. Not sure which is correct on my homework these are both choices. One choice is D=6 and the other choice is D=6 and 14.
Answer by solver91311(24713) (Show Source): You can put this solution on YOUR website!
Square both sides:
Collect terms and put the equation in standard quadratic form:
Factor:
(d -14) = 0)
Hence:
or
Check the answers:
 - 3}\ =^{\tiny{?}}\ 14 - 9)
14 checks
 - 3}\ =^{\tiny{?}}\ 6 - 9)
6 is an extraneous root introduced by the operation of squaring the variable. Exclude this root.
Your answer is 14 only.
John
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