Question

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

Answer 1

Answer:

Answer: x will be equal to 5 and -8

Step-by-step 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:

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