math help please 4x^2-36x+80=

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wwrff1974

Mathematics

Description

need help with this problem please

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Explanation & Answer

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Factor out 4, 4(x^2-9x+20)

-5 and -4 add up to 9 so 

If you factor the problem, you get 4 (x-4)(x-5)=0

Solutions are x-4=0, x-5=0

X=4,x=5


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