Question

Evaluate the expression
(2t+4)/r^3, for r =-2 and t=-4

Answer 1

• 64

Explanation:

(2t+4)^4/r^2 when,

• t = -4
• r=-2

`\mathrm{\cfrac{\left(2t+4\right)^4}{r^2}}`

• 
  `\mathrm{\cfrac{(2(-4)+4)^4}{(-2)^2}}`

• 
  `\mathrm{(2(-4)+4)^4=\bf 256}`

• 
  `\mathrm{\left(-2\right)^2=\bf 4}`

• 
  `\mathrm{\cfrac{256}{4}}`

• 
  `\mathrm{64}`

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Hope this helps!