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Factor completely: x^2 − 10x + 25
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Find two numbers that multiply to 25 and add to -10.
What are those two numbers?
we can use the formula a^-2ab+b^2=(a-b)^2
FYI I JUST posted a long explanation of that formula in this thread: http://openstudy.com/study#/updates/4fe8e018e4b0bbec5cf9509c
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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
okayy thanks guysss
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