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OpenStudy (anonymous):
factor then use zero product principle 5x^3+3x^2=125x+75
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OpenStudy (anonymous):
x^2(5x+3)=75(5x+3) ==> x^2=75 ==> x=5sqrt(5) or x=-5sqrt(5)
OpenStudy (anonymous):
x=5sqrt(3) or x=-5sqrt(3)
OpenStudy (anonymous):
take: 5x^3+3x^2-125x-75=0 (5x+3)(x^2-25)=0 5x+3=0===>x=-3/5 x^2-25=0===>(x+5)(x-5)===>x-5 and x=-5
OpenStudy (anonymous):
thats what i did thanks!! :D
OpenStudy (anonymous):
np
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