Find the unknown value — task. Maths CBSE Live product, Class 8 (2025-26).

Calculate the value of \(a\) so that

{(-5.7)}^{8} \times {(-5.7)}^{7} = {(-5.7)}^{8 a - 9}

Answer: \(a\) \(=\)

i i

[Note: Insert \((+)\) or \((-)\) sign in the first answer field.]

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6. Find the unknown value