exam Maths Puzzle Numerical Ability

can someone please help me with this problem:

What are the zeros of this polynomial if b = -2: f(x) = x^2 + 2x + 2b + bx?

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exam Other Question

A rectangular photograph is mounted on a frame that is one inch wide. If the photograph is twice as long as it is wide , anad the area of the phot and the fram together is 60 inches squared, what are the dimensions of the photo For the function defined by f(x) =5x - 4, find a formula for f -1(x).