Question

Solve the equation: 4x2 = 36
{6, -6}
{3, -3}
{2/3, -2/3}
{3/2, -3/2}

Answer 1

first divide both sides by 4, what do you get?

Answer 2

4x2=36
divide both sides by 4 to get
x2=9
square both sides
note that the square of a number is both negative and positive
therefore
x=-3
x= 3
{3,-3}