exam Maths Puzzle Numerical Ability

solve as quaditic equations
4x^2=13x+12

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exam Other Question

Solve the exponential equation e^x+3=8: Express the solution as a natural logarithm. Solve the equation for x:
x^2 + 4x + 4 = 7
(x + 2)(x + 2) = 7
(x + 2)^2 = 7
x + 2 = +/- radical 7
x = -2 +/- radical 7

Is this correct?