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If a * b = 2a - 3b + ab, then 3 * 5 + 5 * 3 is equal to?

122
224
326
428

Answer:- 1

Explanation:-

Solution:

\begin{aligned} 3 * 5 + 5 * 3 \\ \Rightarrow 3 * 5 = 2 \times 3 - 3 \times 5 + 3 \times 5 \\ \Rightarrow 3 * 5 = 6 - 15 + 15 \\ \Rightarrow 3 * 5 = 6 \\ \Rightarrow 5 * 3 = 2 \times 5 - 3 \times 3 + 3 \times 5 \\ \Rightarrow 5 * 3 = 10 - 9 + 15 \\ \Rightarrow 5 * 3 = 16 \\ ∴ 3 * 5 + 5 * 3 \\ \Rightarrow 6 + 16 \\ \Rightarrow 22 \end{aligned}

$\eqalign{ & 3*5 + 5*3 \cr & \Rightarrow 3*5 = 2 \times 3 - 3 \times 5 + 3 \times 5 \cr & \Rightarrow 3*5 = 6 - 15 + 15 \cr & \Rightarrow 3*5 = 6 \cr & \Rightarrow 5*3 = 2 \times 5 - 3 \times 3 + 3 \times 5 \cr & \Rightarrow 5*3 = 10 - 9 + 15 \cr & \Rightarrow 5*3 = 16 \cr & \therefore 3*5 + 5*3 \cr & \Rightarrow 6 + 16 \cr & \Rightarrow 22 \cr}$

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", "dateCreated": "7/24/2019 10:09:12 AM", "author": { "@type": "Person", "name": "Nitin Sir" } }, "suggestedAnswer": { "@type": "Answer", "text": "

Solution:

\begin{aligned} 3 * 5 + 5 * 3 \\ \Rightarrow 3 * 5 = 2 \times 3 - 3 \times 5 + 3 \times 5 \\ \Rightarrow 3 * 5 = 6 - 15 + 15 \\ \Rightarrow 3 * 5 = 6 \\ \Rightarrow 5 * 3 = 2 \times 5 - 3 \times 3 + 3 \times 5 \\ \Rightarrow 5 * 3 = 10 - 9 + 15 \\ \Rightarrow 5 * 3 = 16 \\ ∴ 3 * 5 + 5 * 3 \\ \Rightarrow 6 + 16 \\ \Rightarrow 22 \end{aligned}

$\eqalign{ & 3*5 + 5*3 \cr & \Rightarrow 3*5 = 2 \times 3 - 3 \times 5 + 3 \times 5 \cr & \Rightarrow 3*5 = 6 - 15 + 15 \cr & \Rightarrow 3*5 = 6 \cr & \Rightarrow 5*3 = 2 \times 5 - 3 \times 3 + 3 \times 5 \cr & \Rightarrow 5*3 = 10 - 9 + 15 \cr & \Rightarrow 5*3 = 16 \cr & \therefore 3*5 + 5*3 \cr & \Rightarrow 6 + 16 \cr & \Rightarrow 22 \cr}$ ", "dateCreated": "7/24/2019 10:09:12 AM" } }

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