Question 15
Find and correct the errors in the statement: $(a - 4) (a - 2) = a^{2} - 8$

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Solution

$L . H . S = (a - 4) (a - 2) = (a)^{2} + [(- 4) + (- 2)] (a) + (- 4) (- 2) = a^{2} - 6 a + 8 \neq R . H . S T h e c o r r e c t s t a t e m e n t i s (a - 4) (a - 2) = a^{2} - 6 a + 8$

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