-x -2.9(-3.c-7)+5= -(-4.9x + 4.8)

Step-by-step explanation:

This is simply just simplify you do -2.9 times -3  and c-7 . Once you get that anwser simplify the other side which is pretty easy because there is -1 being multiplied by -4.9=+4.9  and -4.8 then add those up and simplfy your ansers and the last step is division.

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.

d

step-by-step explanation:

i used the pitagoras theoreme