Q26 of 34 Page 252

If then show that bx2 - ax + b = 0.






= 4b2x2 + a2 - 4abx = a2 - 4b2


= 4b2x2 - 4abx + 4b2 = 0 {rearranging terms and cancelling a2}


Dividing the expression by 4b - bx2 - ax + b = 0


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