exam Maths Puzzle Numerical Ability

Solve by using the quadratic formula. x^2 = -5x - 5

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exam Other Question

GIVEN f(x)=5x+7 AND g(x)=x^2+7, FIND (g o f)(x). if 2 is subtracted from a number and this difference is tripled, the result is 6 more than the number.Find the number.