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Q.

Find the zeroes of the polynomial abx2-a+b2x+a+b2

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a

ba+b,aa+b

b

a+bb,ba+b

c

-aa+b,-ba+b

d

a+bb,a+ba

answer is D.

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Detailed Solution

abx2-a+b2x+a+b2 abx2[a(a+b)+b(a+b)]x+(a+b)2abx2a(a+b)xb(a+b)x+(a+b)2ax[bx(a+b)](a+b)[bx(a+b)][bx(a+b)][ax(a+b)]bx(a+b)=0( or )ax(a+b)=0x=a+bb( or )x=a+ba

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