Solve for x, given the equation Square root of x minus 5 + 7 = 11. x = 21, solution is extraneous x = 21, solution is not extraneous x = 81, solution is extraneous x = 81, solution is not extraneous

This is the concept of algebra, to solve the expression we proceed as follows:

√ (x-5) + 7=11

put like terms together:

√ (x-5) = 11-7

√ (x-5) = 4

squaring both sides we get:

x-5=16

x=16+5

x=21

The solution is not extraneous.