Question

The quadratic equation -2w^2-6+80 will be zero when w equals

Answer 1

Answer: x will be equal to 5 and -8

Explanation:

`{ \tt{ - 2 {w}^(2) - 6w + 80 = 0 }}`

» Divide all equation through out by -2:

`{ \tt{ {w}^(2) + 3w - 40 = 0}}`

» Factorise the equation quadratically:

`{ \tt{(x - 5)(x + 8) = 0}} \\ { \tt{x = 5 \: \: and \: \: - 8}}`