How to find the sum of the coefficients for 5x2 + 4xy – 3(x +2). Please explain.

Question

anonymous · Answer

How to find the sum of the coefficients for 5x^2 + 4xy – 3(x +2). Please explain.

anonymous · Answer

so it can be zero

anonymous · Answer

the coefficients in this expression are the numbers

anonymous · Answer

Please can you explain

anonymous · Answer

sorry not all the numbers - only those in front of variables
so they are 5, 4 and -3

anonymous · Answer

sum of these = 6

anonymous · Answer

so -6 is the constant number

anonymous · Answer

yea

anonymous · Answer

but the answer for this question is zero

anonymous · Answer

oh ok - so they have included -6. You can regard a constant as the coefficient of x^0 that is 1.   -6 = 6x^0.

anonymous · Answer

-6 = -6x^0.

anonymous · Answer

Thank you.I always learned that number without variable is constant.but it excludes for for only quadratic equations . Is it right

anonymous · Answer

sorry but i'm not really sure - it appears that way.