kelsey1
what are the zeros of f(x)=x^47x^3+15x^29x?



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sauravshakya
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To fnd zeros,
f(x)=0
x^47x^3+15x^29x=0

sauravshakya
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Now, SOLVE FOR x
can u?

kelsey1
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I don't remember can you show me how please

sauravshakya
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Try to factor x^47x^3+15x^29x

kelsey1
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oh okay I remember what to do now!

kelsey1
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Can you show me how to factor that like I remember what to do once you find X but I'm not so great at factoring 4terms and 3terms..

sauravshakya
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x^47x^3+15x^29x
=x(x^3 7x^2+15x9)
=x{ x^3 x^2 6x^2 +6x +9x9}
=x{ x^2(x1) 6x(x1) +9(x1)}
=x{(x1)(x^26x+9)}
=x(x1){ x^2 2*x*3+3^2}
=x(x1)(x3)(x3)

sauravshakya
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Now, can u do the rest?

kelsey1
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Yes! Thank You so much! The X on the outside is equal to? 0

sauravshakya
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yes

kelsey1
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Yay okay thank you!

sauravshakya
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welcome