briannacharron
briannacharron briannacharron
  • 22-08-2018
  • Mathematics
contestada

Kelly is solving x^2 - 4x = 7 by completing the square. What number will Kelly add to both sides of the equation?

x^2 - 4x + ___ = 7 + ____

Relax

Respuesta :

Lazerpent
Lazerpent Lazerpent
  • 22-08-2018

To complete the square, you add [tex]\frac{b}{2}^2 [/tex] to both sides

so [tex]\frac{4}{2}^2 [/tex]

[tex]2^2 [/tex]

4

[tex] x^2 - 4x + 4=7 + 4 [/tex]

Answer Link

Otras preguntas

How much times does 7 go into 17?
name and describe the cell structure that helps prevent damage to certain cells when they are subjected to high osmotic pressure
What is a summary number model :) by the way here is the question joe ordered 72 plants for his patio garden. Each pot holds 4 plants.how many pots are needed t
What is the simplest form of the expression 6x(x − 4) − 16x2 − (9x − 1)
How to write 4/50 as a decimal
How is linkage used to make gene maps?
area of room is 320 and width is 4/5 of length
Why did Daniel shays rebel against the government
what is the likely mechanism of inheritance for a character with a large range of phenotypes?
Find f(a), f(a+h) and the difference quotient (f(a+h)-f(a))/ h, where hod want equal 0. F(x)= 2x/ x-1