f(x)= x^2+3x+2. Find the roots

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• A x= -2,-1
• B x=1,2
• C x=0,2
• D x=0,1

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Answer: A. x= -2,-1

Factorise: x^2 + 3x + 2 = (x + 1)(x + 2), since 1 x 2 = 2 and 1 + 2 = 3. Setting each bracket to 0 gives x = -1 or x = -2.

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