exam Maths Puzzle Numerical Ability

Solve the Inequality. Graph the solution set and write the solution set in the interval notiation. --> (a+5)(a-5)(a-7)>0

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This is from beginning algebra chapter 4 section 4.6 # 68. Rewrite the middle term as a sum of two terms then factor completely. This is what I have so far...
12 w ^ 2 + 19 w + 4 how do i solve f(x-2)+3