when asked to factor the trinomial 8x2-8x-16, a student gives the answer (x-2)(x+1. What is one thing wrong with this answer?

1 answer:

5 0

One thing wrong is there is not closing parenthasees after x+1
and also, if you multiply it out, the answer is not 8x^2-8x-16 so the factored form given is worng

the real factored out form is 8(x-2)(x+1)
that person forgot the 8 in the front

You might be interested in

A tree 5 feet tall grows an average of 8 inches each year. Write and graph an equation to model the tree's height h after x year

Stolb23 [73]

Okay my example will be for if you watched that tree for like 5 years and I can`t really put in a graph here so sorry about that

The equation is basically the original height, 5 foot, and multiply it by the number of years you`ve been watching it grow for example when you watch it for 6 years then it will be the original height of 5 foot multiplied by the number years it has been since you look at it which is 6 years. 5 * 6 = 30 so after 6 years it will grow 30 inches.
1st year: 5 foot
2nd year: 5 foot * 2 = 10 inch increase in height
3rd year: 5 foot * 3 = 15 inch increase in height
4th year: 5 foot * 4 = 20 inch increase in height
5th year: 5 foot * 5 = 25 inch increase in height
So basically the equation is 5 foot * the number of years its been = total increase in height

I hope this helps

3 0

4 years ago

TS is the height of a building. PQR is a pole in front of the building. QT is a horizontal cable that supports the pole to the b

Iteru [2.4K]

Answer:

The answer is 65.75

Step-by-step explanation:

Since tq is perpendicular to PR then qtsr becomes square

Then

$qr = 30 \: \: \: \: \: and \: qt = 30 \\$