Question

√(x-y)+m=d
√(x-99)+4=20
√(x-99)=16
(√(x-99))^2=16^2
x-99=256
+99 +99
X = 355

How do I figure out if this is extraneous or not?

Answer 1

put 355 in for x in the original. If it makes the equation true it's a solution. If it makes it false it's extraneous

Answer 2

@peachpi thank you!

Answer 3

you're welcome