Question

Find the roots of polynomial x2+2x-15

Answer 1

x² +2x-15=0

WE MUST GET -15 IF WE ADD BOTH THE FACTORS

-15

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3 -5

(x+3) (x-5) = 0

(x+3) = 0 ; x = -3

(x-5) = 0 ; x = 5

x = -3 , 5

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