Question

Find all the zeroes of the polynomial x^4+2x^3-17x^2-4x+30, given that two of its zeroes are 3 and -5

Answer 1

Xsquare+2x-15

Xsquare+5x-3x-15

X(x+5)-3(x+5)

X-3=0. X+5=0

X=3. X=-5

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