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1 vote
Which of the following constants can be added tox^2-10x to form a perfect trinomial

User Dezzy
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1 Answer

6 votes


Use\ (a-b)^2=a^2-2ab+b^2\\\\x^2-10x=x^2-2(x)(5)\\\\\text{therefore we need add}\ 5^2\\\\x^2-2(x)(5)+5^2=(x-5)^2

User Robert Gabriel
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