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Afunctionisdifferentiable at x-valuesif thex-valuehas acorresponding y-valueother than 0.ThefunctionisdifferentiableatGiven that:To determine thevalues of x, we will make use of thegraphical method.See attachment forgraph ofFrom thegraph, we can see that the line oftouches thex-axisat -5 and 5.This means that thefunctionisdifferentiableatall values of x except -5 and 5.Usinginterval notation, this is represented as:Read more aboutdifferentiationat:brainly.com/question/18962394-...