Simplify to create an equivalent expression. 2 ( − 1 4 + r ) − ( − 3 r − 5 ) choose 1(choice a) a: 5r − 23 choice b) b: 5r − 33 (choice c) c: − 5r − 23 (choice d) d: 5r + 23

5r-23  Choice A

Step-by-step explanation:

2 ( − 1 4 + r ) − ( − 3 r − 5 )

distribute

2*-14 +2*r - 1*-3r -1*-5

-28 +2r +3r +5

combine like terms

2r+3r -28+5

5r-23

d? maybe

step-by-step explanation:

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.