exam Maths Puzzle Numerical Ability

Factor trinomials.
2x^2+10x+8
2(x^2+5x+4)
2(x^2+1)(5x+4)
Is this right?

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exam Other Question

What are the coordinates of the focal point y=3(2)(^2x+4)-5 ? Solve the system by addition or substitution.
10x-5y=17
y=2x-3