What is
-5 3/4 - 3 1/2 =

-9 1/4

Step-by-step explanation:

-5 3/4 - 3 1/2

-5 3/4 - 3 2/4

-9 1/4

-21

—

4

Step-by-step explanation:

-5•3/4

————

-3•1/2

-5•3/4

————

-3/2

2(-5•3)+4(-3)

———————

4•2

2(-15)-4•3

—————

4•2

-30 -12

————

4•2

-42

———

4•2

-2•3•7

————

2•2•2

-3•7

———

2•2

= -21

———

4

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.

step-by-step explanation:

what grade level is this? need to know so i can look in my old textbooks!