exam Maths Puzzle Numerical Ability

Add, using the vertical method.
5x²+ 2x- 4, x²- 2x - 3, and 2x²-4x -3

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exam Other Question

Problem#13
Simplify. ((m^4))^3(m^2)^9)/((m^3)^2)

Problem#14
Divide

(x^3+2x^2+x+12)/(x+3)

Problem#15
multiply (2x-4)^2

Problem#16
simplify (4x)^2
The sum of the squares of two consecutive, positive integers is 85. Find the integers.