Question 151325
I'll do the first one to get you started.



{{{5*sqrt(x+1)=3}}} Start with the given equation.



{{{sqrt(x+1)=3/5}}} Divide both sides by 5.



{{{x+1=(3/5)^2}}} Square both sides.



{{{x+1=9/25}}} Square {{{3/5}}} to get {{{9/25}}}



{{{x=9/25-1}}} Subtract 1 from both sides.



{{{x=-16/25}}} Combine the fractions.



So the solution is {{{x=-16/25}}} which approximates to {{{x=-0.64}}}