## anonymous 4 years ago Evaluate when t=1.5 [(t+2)squared-3t]/5 the answer is (t squared +t+4)/5 right?

1. precal

are you just plugging in t=1.5? This sounds like particle motion (calculus and physics).

2. anonymous

I just plugged it into the simplified form and got 1.55. Is that right?

3. precal

Is this calculus? Particle motion is not that easy.

4. anonymous

no i think it's algebra

5. precal

Ok then let's do it using Algebra only $\left[ \left( t+2 \right)^2-3t \right]/5$ if t=1.5 then $\left[ \left( 1.5+2 \right)^2-3*1.5 \right]/5$ $\left[ \left( 3.5 \right)^2-4.5 \right]/5$ $\left( 12.25-4.5 \right)/5$ $\left( 7.75 \right)/5$ 1.55

6. anonymous

grazi, wanna help me with another one, simpler ?

7. precal

8. anonymous

i'm posting it in the chat

9. precal

by the way you answer is correct if you did not have t=1.5

10. anonymous

huh???

11. precal

$\left( (t+2)^2-3t \right)/5=\left( t^2+t+4 \right)/5$