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When asked to factor the trinomial 4x^2+20x+25, a student gives the answer (2x-5)(2x-5). What is one thing wrong with this answer?
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When asked to factor the trinomial 4x^2+20x+25, a student gives the answer (2x-5)(2x-5). What is one thing wrong with this answer?

User Redwood
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2 Answers

3 votes
when factored out you would get 4x^2-20x+25 you don’t want a -20x you want a +20x so you would want (2x+5)(2x+5) instead
User Noampz
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5 votes

The minus signs should be plus signs

User Duefectu
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8.0k points
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