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Discuss the signs of the following quadratic expressions when x is real in.i) x²- 5x + 4 |
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Answer» Step-by-step EXPLANATION: =x ^ 2 −4x−x+4 =x(x−4)−1(x−4) =(x−4)(x−1) ∴x ^2−5x+4 = (x−4)(x−1) |
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