exam Maths Puzzle Numerical Ability

How Do I Factorize These problems?
22)y2(squared)-5y+4
and
40)8x2(squared)+8xy+8xz+3x+3y+3z

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exam Other Question

Please help me with this.



Determin "k" if -2 is a root of

2x^2+ kx +2 =0


17-5/13=s+14 11/13