Question

f(x)=-2x^3+5, find x if f(x)=-49

Answer 1

are there any parentheses in the equation?

Answer 2

no

Answer 3

you need to solve \(-2x^3+5=-49\)

Answer 4

ubtract 5 from both sides
divide both sides by -2
cube root both sides

in that order

Answer 5

o equate both of the given functions...as

-2x^3+5=-49
=>-2(x^3)+5-5=-49-5
=>-2x^3=-54
=>x^3=54/2=27
=>x= cuberoot 27= (3^3)^1/3=3^(3/3)=3

so x=3

Answer 6

thank you so much

Answer 7

you are welcome.