exam Maths Puzzle Numerical Ability

I need to know if this is correct. Factor completely

x^2 + 9x + 8 = (x+1)(x+8)

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so like i earlly need help like alot so its


87 1/2 % of 32
3 2
12x -8x +4x

the 3 goes over the 12, the 2 over the 8