-8/5 is a rational number because in order to be a rational number it must be able to be written as a fraction. -8/5 is a fraction; therefore, the negative does not affect it.
Write out all the pairs of numbers which can be multiplied to produce c.
Add each pair of numbers to find a pair that produce b when added. ...
If b > 0, then the factored form of the trinomial is (x + d )(x + e). ...
Check: The binomials, when multiplied, should equal the original trinomial.
Answer:
10 square units
Step-by-step explanation:
We want to find the area under the curve
from x=1 to x=3.
We use definite integrals to find this area.

We integrate to obtain:

We evaluate the limits to get:


Therefore the area under the curve from x=1 to x=3 is 10 square unit.
11tens the plus together equals to 110