Summation of Polynomials Using Horizontal Method

Q. Collect like terms and simplify the expression
12m-9m+5m-4m-7m+10

Q. Simplify :- - 13mn + 5mn - 7np

Q.

Simplify:$(2x-3y)(2x+3y)$

Q.

The given expression: 2x²+3y+5z² +10p+6y+7x², on simplification gives:

1. 19x²+10y+5z²+10p

2. 9x²+12y+5z²+10p

3. 9x²+9y+5z²+10p

4. 11x²+2y+10z²+10p