If alpha and beta are the zeros of the polynomial 21y2-y - 2, find a quadratic polynomial whose zeroes are 2 alpha and 2 beta
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sum of zeros= 2alpha+2beta
2(alpha+beta)
2(1/21)
= 2/21
product of zeros= 2alpha*2beta
2(alpha*beta)
2(-2/21)
-4/21
2(alpha+beta)
2(1/21)
= 2/21
product of zeros= 2alpha*2beta
2(alpha*beta)
2(-2/21)
-4/21
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