exam Maths Puzzle Numerical Ability

4x^2+12x+?

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exam Other Question

If the square of 2 less than an integer is 16, find the number(s). find an algebraic expression for the length of a side of a square with area of
a+14ab+49b

1st a to the 6ht , 2nd a cubed, b to the 9th, last b to the 18th