exam Maths Puzzle Numerical Ability

I would appreciate any help with this problem.

Solve by completing the square
4x^2+2x-3=0

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exam Other Question

I would apprecaite some help with the following :

Simplify

3(m^-3)^-2 nm^3n^-1 / mm^2m^0m^-7(m^3)^3 I have a question. I am supposed to find the GCF of each product.

(6y^2 - 3y) (y + 7)

I got 3y (3y + 7) when I worked it out but I am not showing a GCF could you please help me with this problem? Thanks