6 = sqrt( 2z - 3) - 3? 6=2z33?solve the equation

1 Answer
Apr 11, 2017

z = 42z=42

Explanation:

Assuming your question is 6 = sqrt(2 z -3) -36=2z33

add 33 to both sides
6 + 3= sqrt(2 z -3) -3 + 36+3=2z33+3
9= sqrt(2 z -3) 9=2z3

square to both sides
9^2= (sqrt(2 z -3))^2 92=(2z3)2
81 = 2 z - 381=2z3

add 33 to both sides
81 + 3= 2 z - 3 + 381+3=2z3+3
84 = 2 z84=2z

divide 22 to both sides
84/2 = (2 z) /2842=2z2

42 = z42=z