Simplify a2-10a-21a2-6a-7-a2-1a-3

A^2+10a+21a^2+6a 7×a^2 1a+3 a(a+3)+7(a+3)a(a 1)+7(a 1)×(a+1)(a 1)a+3 (a+3)+(a+7)(a 1)+(a+7)×(a+1)(a 1)a+3 =(a+1) ...

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Addition of Rational Expressions

Simplify a2+1...

Question

Simplify $\frac{a^{2} + 10 a + 21}{a^{2} + 6 a - 7} \times \frac{a^{2} - 1}{a + 3}$

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Solution

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Simplify \frac{a^{2} + 10 a + 21}{a^{2} + 6 a - 7} \times \frac{a^{2} - 1}{a + 3}

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