Solve the equation x^3 – 5x^2 + 2x + 8

Elleanor Mckenzie

Elleanor Mckenzie

Answered question

2021-08-16

Solve the equation x35x2+2x+8=0 given that -1 is a zero of f(x)=x35x2+2x+8

Answer & Explanation

SchulzD

SchulzD

Skilled2021-08-17Added 83 answers

Divide f(x) by (x +1)
f(x)=x35x2+2x+8=(x+1)(x26x+8)
f(x) = 0, then
x26x+8=0
(x4)(x2)=0
x = 2. 4
The solution is {1.2.4}

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