ashbrown2117 ashbrown2117
  • 03-10-2018
  • Mathematics
contestada

i need help solving x^2-2=7 by factoring

Respuesta :

MollieToliver MollieToliver
  • 03-10-2018

x^2-2=7

Subtract 7 from both sides

x^2-2-7=7-7

x^2-9=0

x^2-3^2=0

Using a^2-b^2=(a+b)(a-b)

Where a=x and b=3

(x-3)(x+3)

Answer Link

Otras preguntas

A sample taken from a layer of mica in a canyon has 2.10 grams of potassium-40. A test reveals it to be 2.6 billion years old. How much potassium-40 was in the
A 9-meter piece of wire costs $8.64. What is the unit price?
in a prokaryotic cells most ribosomes are
In classical tragedy, what characteristic does the hero often have? A. The hero is an only child. B. The hero is an orphan. C. The hero is of noble birth. D
Which of the following can increase the clarity of a message?
Which of the following regions is labeled with the number 1 on the map above?
Can anybody tell me why Romeo and Juliet is a tragedy??
Solve for x, I tried but I don’t think I did it right.
I need help on how to set up the y-axis which would be the number from questions 2&3​?
What do we call a virus that attacks a bacterium?