exam Maths Puzzle Numerical Ability

Hello,

Can someone please factor this completely.

-10w squared - 28w + 6

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exam Other Question

susan wants to put acoustic tiles on her ceiling her room is 8ft,5ft,10ft,12ft.if each ceiling tile is 12 inches by 12 inches square and cost.83 cents each how much money will she solve (u-10)2power -32=0 u is a real number