If x = 3 and y = -1, evaluate 2(x\(^2\) - y\(^2\))

Assessment: WAEC SSCE - General Mathematics - 2020 (Objective) Subject: General Mathematics

Question 1 Report

If x = 3 and y = -1, evaluate 2(x\(^2\) - y\(^2\))

Answer Details
The expression 2(x\(^2\) - y\(^2\)) means 2 times the difference of x squared and y squared. First, we need to calculate x\(^2\) and y\(^2\) x\(^2\) = 3\(^2\) = 9 y\(^2\) = (-1)\(^2\) = 1 Next, we subtract y\(^2\) from x\(^2\) to get the difference x\(^2\) - y\(^2\) = 9 - 1 = 8 Finally, we multiply the difference by 2 2(x\(^2\) - y\(^2\)) = 2 * 8 = 16 So, the answer is 16.

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