What will be the sum of the numerical coefficients in the below expression: [2 MARKS]
$4 x^{2} + 12 x y - 5 y^{2} - 11 y$

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Solution

Numerical Coefficients: 1 Mark
Sum: 1 Mark

The numerical coefficient of $4 x^{2}$ = 4
The numerical coefficient of $12 x y$ = 12
The numerical coefficient of $- 5 y^{2}$ = -5
The numerical coefficient of $- 11 y$ = -11

Sum of the coefficients = 4 + 12 - 5 - 11 = 0
Hence, the sum of all the numerical coefficients in the above expression is zero.

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