Which expression is equivalent to 2.2-2.5?

Step-by-step explanation:

Without choices, an exact answer cannot be given. Here are some that will work.

2.2 - 2.5 = - 0.3

So all you have to come up with are expressions that give - 0.3. Here are some.

5 - 5.3

4.5 - 4.8

10 - 10.3

9.3 - 9.6

x= -3 and

step-by-step explanation:

to find the roots of a cubic, use division or factoring to find the factors then set equal to 0. as this is a difference of cubes, it factors into

where a is the cube root of .

here   this is 27 and the cube root of 27 is 3. so we write using the form:

.

set each factor to 0 and solve for x.

x-3=0

x=3

the quadratic expression does not factor and must be solved using the quadratic formula.

where a = 1, b=3, and c=9

this cubic has two complex roots.