exam Maths Puzzle Numerical Ability

please help solve

1) factor by grouping 2ab^2-8b^2+a-4

2) Factor the trinomial k^2-11k+30

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exam Other Question
how would I write an equation using: slope=1/3,passing through(-1,5)? thank you!! ^(x+^(x+^(x+^......)= 2; Find x;