hxtu hxtu
  • 17-01-2022
  • Mathematics
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the quadratic equation -2w^2-6+80 will be zero when w equals

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brainsoft
brainsoft brainsoft
  • 17-01-2022

Answer:

Answer: x will be equal to 5 and -8

Step-by-step explanation:

[tex]{ \tt{ - 2 {w}^{2} - 6w + 80 = 0 }} [/tex]

» Divide all equation through out by -2:

[tex] { \tt{ {w}^{2} + 3w - 40 = 0}}[/tex]

» Factorise the equation quadratically:

[tex]{ \tt{(x - 5)(x + 8) = 0}} \\ { \tt{x = 5 \: \: and \: \: - 8}}[/tex]

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