exam Maths Puzzle Numerical Ability

Sorry, I did not know where this one fits in at.
Divide: 7x^5y^5 - 21x^4y^4 + 14x^3y^3/7x^3y^3

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exam Other Question

solve using the square root property

2x^2-35=15 I have to graph these equations.I have to linear and non linear equation.
1.y=5x^-2
2.3x-1=5x-y
3.y=|x|+3
4.x+2=2x-1
I need to do x and y on a graph. I need to find my poi