AznMaster1
AznMaster1
23-08-2017
Mathematics
contestada
Solve x^3+5x^2=9x+45
Respuesta :
apologiabiology
apologiabiology
23-08-2017
minus (9x+45) both sides
x³+5x²-9x-45=0
group and factor
(x³+5x²)+(-9x-45)=0
factor
x²(x+5)-9(x+5)=0
undistribute
(x²-9)(x+5)=0
factor difference of 2 perfect squares
(x-3)(x+3)(x+5)=0
set to zero
x-3=0
x=3
x+3=0
x=-3
x+5=0
x=-5
x=-5, and -3 and 3
Answer Link
VER TODAS LAS RESPUESTAS ( 37+ )
Otras preguntas
Six people to can perform a task in 8 days. If we add 2 equally able people, how long would it take?
If a function f is continuous for all x and if f has a relative maximum at (-1, 4) and a relative minimum at (3, -2), which of the following statements must be
Sara cut off 1/8 of a 48-inch piece of ribbon. Jane cut off 1/9 of a 36-inch piece of ribbon. They compared their cut pieces. Whose piece is longer? How much lo
7b ÷ 12 = 4.2 What is b?
10n squared -26n +12
the problem is three n squared minus 17 n plus 24
does a trapezoid have exactly one pair of congruent sides sometimes, always, never
You have had a class discussion on the following question:What areYou have had a class discussion on the following question:What are the pros and cons of keepin
What is 14/10 as a decimal?
How to I find the perimeter of rhombus
