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Review exercise

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Product (d) Quotient\\ **Answer:**\\ $c$\\ (xi) Simplify $\frac{a}{9a^2-b^2}+\frac{1}{3a-b}$= -... d) $\frac{b}{9a^2-b^2}$\\ **Answer:**\\ $c$\\ (xii) Simplify $\frac{a^2+5a-14}{a^2-3a-18}\times \fr... (d) $\frac{a-2}{a+3}$\\ **Answer:**\\ $a$\\ (xiii) Simplify $\frac{a^3-b^3}{a^4-b^4}\div \frac{a^... ) $\frac{a+b}{a^2+b^2}$\\ **Answer:**\\ $a$\\ (xiv) Simplify $\left(\frac{2x+y}{x+y}-1\right)\div \