lolo4421 lolo4421
  • 02-10-2019
  • Mathematics
contestada

The square of 9 less than a number is 3 less than the number. What is the number?
-12 or 7
-12 or -7
-7 or 12
07 or 12

Respuesta :

linricky linricky
  • 02-10-2019

Answer: D

Step-by-step explanation:

(x-9)² =  x-3

(x-9) (x-9)= x-3

x² - 9x-9x +81 = x-3

x² -18x+81 =x-3

x²-19x+84 =0

(x-12)(x-7)=0

x=12 or 7

Answer Link

Otras preguntas

Who gained control of the Ohio River Valley following the French and Indian War?
The sum of the exterior angles of a pentagon equals________. 180° 270° 360° 540°
what is the intersection of plane STXW and plane SVUT
Where was the first medical school established?
Sales, property, and income are three types of _____. profits income interest taxes
Is this correct? I had to write an equation in point-slope form and slope-intercept form for each line.
Wesley lives in a apartment and would like to have a vegetable garden. His city offers garden plots,but he has to pay for the fencing.Use A=lw
why did the average urban worker live on the edge of poverty
Give two examples of gravity in the solar system
can you put 8,620,407 in words today?please and thank you.