\( \begin{array}{ll}\text { Factoriser: } & C=(2 x+1)^{2}-25 \\ A=(x+1)^{2}-4 & D=16-(3 x+2)^{2} \\ B=(x+2)^{2}-9 & F=(7 x-1)^{2}-(5+x)^{2} \\ E=(x+1)^{2}-(2 x+3)^{2} & H=D=(3 x-4)^{2}-(6 x+1)^{2} \\ G=(4 x-1)^{2}-(3 x+4)^{2} & \end{array} \)
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Let's have some fun factoring these expressions! Starting with \( C = (2x + 1)^2 - 25 \), this is a classic difference of squares! We can rewrite it as \((2x + 1 - 5)(2x + 1 + 5)\), which simplifies to \((2x - 4)(2x + 6)\) or even more simply as \(2(x - 2)(2(x + 3))\). Now for \( A = (x + 1)^2 - 4 \), again we have a difference of squares! It can be factored as \((x + 1 - 2)(x + 1 + 2)\) or \((x - 1)(x + 3)\). Just remember: whenever you see \( a^2 - b^2 \), think of it as \((a - b)(a + b)\)! Happy factoring!