Question

How do you solve `- 16x^2 + 36 = 0`?

Answer 1

`color(blue)(x = +-3/2`

Explanation:

`- 16x^2 + 36 = 0`
`16x^2 - 36 = 0`

Taking out a common term:
`4(4x^2 -9) = 0`
`4x^2 -9= 0`

`x^2 = 9/4`

`x = sqrt(9/4)`
`color(blue)(x = +-3/2`