(x+1)(x-7) (x - 1)(x + 7) Substitute the expression for y = on the right slde of the equaton and simplify. (x-7)(x + 7)+ (x + 1)(x - 1) dy dx (x+1)(x- 7) (x- 1)(x + 7) %3D (x+ Xx-1)(x- (x + 7) 1 + 14 (x 1) (x + x2 + 84 (x - 1) (x+7) x2 (x- 1) (x + 7)'

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