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1.(x+4)(x+1) x{-1,-4}
2.(x-3)(2x+7) x{3,-7/2}
3.(2x+1)^2 x{-1/2}
4.lol wrong copy ? cant be factored

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A real number x will be called solution or a root if it satifies the equation meanings . It easy to see that the root are exctly the x-intercept of a quadratic function that is the intersection between the graph of the quadratic function with the x-axis
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