If a b = a-b+ab, then 2 5 + 5 * 2 is

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{"content":[{"content":[{"type":"text","marks":[{"type":"bold"}],"text":"Step 1 (Understand the Operation):"},{"type":"text","text":" The binary operation "},{"attrs":{"latex":"*"},"type":"math_inline"},{"text":" is defined as:","type":"text"}],"type":"paragraph"},{"attrs":{"latex":"a * b = a - b + ab"},"type":"math_block"},{"content":[{"text":"Step 2 (Evaluate 2 * 5):","type":"text","marks":[{"type":"bold"}]},{"text":" Substitute ","type":"text"},{"attrs":{"latex":"a = 2"},"type":"math_inline"},{"type":"text","text":" and "},{"attrs":{"latex":"b = 5"},"type":"math_inline"},{"text":" into the formula:","type":"text"}],"type":"paragraph"},{"attrs":{"latex":"2 * 5 = 2 - 5 + 2(5) = -3 + 10 = 7"},"type":"math_block"},{"content":[{"text":"Step 3 (Evaluate 5 * 2):","type":"text","marks":[{"type":"bold"}]},{"text":" Substitute ","type":"text"},{"type":"math_inline","attrs":{"latex":"a = 5"}},{"text":" and ","type":"text"},{"attrs":{"latex":"b = 2"},"type":"math_inline"},{"text":" into the formula:","type":"text"}],"type":"paragraph"},{"attrs":{"latex":"5 * 2 = 5 - 2 + 5(2) = 3 + 10 = 13"},"type":"math_block"},{"content":[{"marks":[{"type":"bold"}],"text":"Step 4 (Sum the results):","type":"text"},{"text":" Add the two values together:","type":"text"}],"type":"paragraph"},{"attrs":{"latex":"2 * 5 + 5 * 2 = 7 + 13 = 20"},"type":"math_block"},{"type":"paragraph","content":[{"marks":[{"type":"bold"}],"text":"Step 5 (Conclusion):","type":"text"},{"text":" The value is exactly 20, which is at option index ","type":"text"},{"marks":[{"type":"code"}],"text":"2","type":"text"},{"text":" in ","type":"text"},{"marks":[{"type":"code"}],"text":"['14', '16', '20', 'none of these']","type":"text"},{"text":".","type":"text"}]}],"type":"doc"}

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