Negative of an Algebraic Expression
The negative of an algebraic expression is obtained by changing the sign of each term in it.
Example –
1) If we multiply by the negative ‘-‘ sign to -4x + 3y – 8z,
Then, the result should be = - ( -4x + 3y – 8z) = 4x – 3y + 8z, where multiplication of two negative ‘-‘ sign result count as positive ‘+’ sign and multiplication of one negative ‘-‘ sign and one positive ‘+’ sign count as ‘-‘ sign.
2) If we multiply by the positive ‘+’ sign to -4x + 3y – 8z,
Then, the result should be = + ( -4x + 3y – 8z) = - 4x + 3y – 8z, where multiplication of two positive ‘+’ sign result count as positive ‘+’ sign and multiplication of one positive ‘+’ sign and one negative ‘-’ sign count as ‘-‘ sign.