Question 118484


SOLVE THE EQUATION ALGEBRAICALLY. CHECK SOLUTION BY GRAPHING.
#38   

{{{x^2-11=14}}}

{{{x^2 =14 + 11}}}

{{{x^2 = 25}}}
	
{{{x = sqrt(25)}}}

{{{x[1] = 5}}}

{{{x[2] = - 5}}}


#42 

{{{2x^2 - 89 = 9}}}

{{{2x^2 = 9 + 89}}}

{{{2x^2 = 98}}}

{{{x^2 = 49}}}

{{{x = sqrt(49)}}}

{{{x[1] = 7}}}

{{{x[2] = - 7}}}


#43 

{{{2x^2+8=16}}}

{{{2x^2 =16 - 8}}}

{{{2x^2 = 8}}}

{{{x^2 = 4}}}

{{{x = sqrt(4)}}}

 {{{x[1] = 2}}}

{{{x[2] = - 2}}}

#44 

{{{3x^2 + 5 = 32}}}

{{{3x^2 = 32 - 5}}}

{{{3x^2 = 27}}}

{{{x^2 = 9}}}

{{{x = sqrt(9)}}}

 {{{x[1] = 3}}}

{{{x[2] = - 3}}}

Check solution by graphing:

#38   

*[invoke solve_quadratic_equation 1, 0, -25]



#42


*[invoke solve_quadratic_equation 1, 0, -49]


#43 

*[invoke solve_quadratic_equation 1, 0, -4]


#44 


*[invoke solve_quadratic_equation 1, 0, -9]