Question

(a-12/23) (a+11/21) ​

Answer 1

Answer:

= a² + 11a/21 - 12a/23 - 132/483

= a² + 253a-252a-132/483

= a² + a-132/483

Step-by-step explanation:

Answer 2

Answer:

$(\frac{a - 12}{23} )( \frac{a + 11}{21} ) \\ = \frac{(a - 12)(a + 11)}{23 \times 21} \\ = \frac{a(a + 11) - 12(a + 11)}{483} \\ = \frac{ {a}^{2} + 11a - 12a - 132 }{483} \\ = \frac{ {a}^{2} - a - 132 }{483}$

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