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OpenStudy (anonymous):
a^2 – a – 20 i need help... factoring trinomials
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jimthompson5910 (jim_thompson5910):
Find two numbers that multiply to -20 and add to -1. Can you find two such numbers?
OpenStudy (anonymous):
-20 times -1
OpenStudy (anonymous):
factoring this... you need two numbers that multiply to -20 and add to make -1 (like @jim_thompson5910 said) 5 and 4 multiply to 20, which one do you make negative? -5 and 4. so (a-5)(a+4) = 0 a = 5, -4
OpenStudy (anonymous):
oh ok thnx!!! :D
OpenStudy (anonymous):
np (:
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