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Question

Find the zeros of the polynomial verify the relationship between the zeroes and their coefficients:
(a) x2+16x2
(b) 43x2+5x23
(c) 2x293x

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Solution

(a) x2+16x2=0
6x2+x12=0
6x2+9x8x12=0
3x(2x+3)4(2x+3)=0
x=43,x=32

(b) 43x2+5x23
43x2+8x3x23=0
4x(3x+2)3(3x+2)
(4x3)(3x+2)=0
x=34,x=23

(c) 2x23x9=0
2x26x+3x9=0
2x(x3)+3(x3)=0
(2x+3)(x3)=0
x=32,x=3

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