write the quadratic equation whose roots are -1,2
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Roots are - 1 and - 2
Sum of roots = - 1 - 2 = -3
Product of roots = (-1)(-2) = 2
Required equation is
x²- (sum of roots) x + Product of roots = 0
=> x² - (-3)x +2 = 0
=> x² +3x +2 = 0
This is the required equation
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