F(x) = 5x^3+ 2x^2 - 90x - 36. finding all zeros by factoring and explaining the steps

Mathematics

1 answer:

ella [17]2 years ago

8 0

Answer:

f(x)=5x^3-2x^2-90x-36=0

=x^2(5x-2)-18(5x-2)=(x^2-18)(5x-2)=0

x^2-18=0/5x-2=0

x^2=18=x=9√2

5x-2=0

x=2/5

zeros are 9√2,2/5

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