Question

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

Answer 1

therefore: {6,-6}

Answer 2

{-3 ,+3}

Answer 3

{3, -3}
you can substitute and verify

Answer 4

4x^2 - 36 = 0
4(x^2 - 9) = 0

x^2-9 = 0

(x-3)(x + 3)

Answer 5

4x^2=36
x^2=36/4
x^2=9
x=sqrt9
x=-3,3

Answer 6

therefore: {3,-3}