1.

x^2 - 11*x %2B 28

Answer»

x^2 - 11x + 28 = 0

x^2 - 7x - 4x + 28 = 0

x(x - 7) - 4(x - 7) = 0

(x - 4)(x - 7) = 0

x = 4, 7



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