Posted by **steve Alexander** on Wednesday, October 29, 2008 at 12:42am.

s=-4.9t²+245t+14.7

s=-4.9(t²-245/4.9t)+14.7

s=-4.9(t²-50t)+14.7

s=-4.9(t²-50+625-625)+14.7

s=-4.9(t²-50+625)+(-4.9)(-625)+14.7

s=-4.9(t-25)²+30625.5+14.17

s=-4.9(t-25)²+3077.2

as you can see on the process of the problem on the part that says...s=-4.9(t²-50+625-625)+14.7...the +625-625 on the next step are on different positions like...-4.9(t²-50+625)...and(-4.9)(-625)...i want to know why and why the negative 625 its multiplying by the negative 4.9 please if somebody can explain me all this problem

- calculus -
**Reiny**, Wednesday, October 29, 2008 at 1:19am
the line

.....s=-4.9(t²-50+625-625)+14.7 ......

has a typo, should have been

s=-4.9(t²-50t+625-625)+14.7 , look at the bold part in the next line

s=-4.9(**t²-50t+625**-625)+14.7

s=-4.9[(t-25)²-625)]+14.7 , now the -4.9 has to be multiplied by both terms inside the square bracket

s = -4.9(t-25)² - 4.9(-625) + 14.7

s = -4.9(t-25)² + 3077.2

## Answer this Question

## Related Questions

- Math - I determined that 5 divided by 8 equals 0.625; however, I cannot ...
- maths - The no.wich Is 4 more than the square of 625 .....is exactly 2 prime ...
- algebra 2 help please - D)x^2+y^2=625 X^2+(y-50)^2=1122 Y=20 (-15,20)(15,20) E)...
- Chemistry - If 10g of NO react with 20g of O2, what is the maximum amount of NO2...
- Science - What is the centripetal force on a vehicle rounding a circular curve ...
- Algebra - The technology cewnter bought a fax machine for $625.00 and it ...
- math - Felipe has saved $625. He is starting a part-time job that pays him $150 ...
- math - Felipe has saved $625. He is starting a part-time job that pays him $150...
- Physics - A 125 kg fullback is running at 5.0 m/s to the east and is stopped in ...
- CHEMISTRY: DUE TONIGHT. CHECK MY ANSWER? - 1. For the simple decomposition ...

More Related Questions