Question

Factor completely: x^2 − 10x + 25

Answer 1

Find two numbers that multiply to 25 and add to -10.

Answer 2

What are those two numbers?

Answer 3

we can use the formula
a^-2ab+b^2=(a-b)^2

Answer 4

FYI I JUST posted a long explanation of that formula in this thread:
http://openstudy.com/study#/updates/4fe8e018e4b0bbec5cf9509c

Answer 5

x^2 − 10x + 25
x^2 - 2(x)(5) + 5^2
now , a=x and b=5
so,
x^2 − 10x + 25 =(x-5)^2

Answer 6

okayy thanks guysss