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Factorise the quadratic by finding two numbers that add to make -7 and multiply to make 10. (i.e. -2 and -5). So x^2  -  7x +  10 = (x - 2)(x - 5) </= 0. Sketch the quadratic to see where it is negativ...

First, let's understand when to use the pluperfect. The pluperfect is a tense expressing a past action, which is before another past action. For instance, "J'allais a la piscine car j'avais fini le d...