Question

What is the solution to the equation 5a^2 - 44 = 81

Answer 1

Answer:

Step-by-step explanation:

5a^2 - 44 = 81

5a^2   = 81  + 44   {add 44 both the sides}

5a^2  = 125

a^2 = 125/5    {divide both sides by 5}

a^2 = 25

a^2 = 5*5

a =  ±5

Answer 2

Answer:

Option c) is correct

ie, a=plus minus 5 or $a=\pm 5$

Step-by-step explanation:

Given equation is $5a^2-44=81$

To find the solution of the given equation we have to solve the equation

$5a^2-44=81$

$5a^2=81+44$

Now applying the algebraic sum to the terms on the right hand side of the equation

$5a^2=125$

$a^2=\frac{125}{5}$

Now applying the division rule

$a^2=25$

Therefore $a=\pm 5$

Therefore option c) is correct

ie, $a=\pm 5$.