if theta and beta are the roots of then find theta square plus beta square
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theta+beta=-b/a
theta^2+beta^2=(theta+beta)(theta-beta)
(- b/a)(b/a)=- b^2/c^2
theta^2+beta^2=(theta+beta)(theta-beta)
(- b/a)(b/a)=- b^2/c^2
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