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Expand (x- a)(x - b). If x^2 -7x + 12 = ...

Expand (x- a)(x - b). If `x^2 -7x + 12` = (x-a) (x-b) then find a+b. Also find ab Calculate the values of a, b.Write the factors of `(x^2-7x+12 )`.Find the solutions of `(x^2 -7x+12)`.

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