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Question

Write three quadratic polynomials that have no real zeroes.

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Solution

A quadratic polynomial ax2+bx+c=0 has no solution when D=b24ac<0

These quadratic polynomials have no zeroes
y=2x24x+5D=(4)24(2)(5)=1640=24y=2x3x2+2D=(3)24(2)(2)=7
y=x22x+4D=(2)24(1)(4)=12

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