Question

please send answer ​

Answer 1

Step-by-step explanation:

i: (2x+7y)+(5x-3y)

=(2x+5x)+(7y-3y)

ans:7x+4y

ii: (8x-12y)+(3y-7x)

= (8x-7x)+(-12y+3y)

ans: x-9y

iii: (3m-6n)+(7n+8m)

= (3m+8m)+(-6n+7n)

ans:11m+n

iv: (a+b+2)+(a-b-1)

=(a+a)+(2-1)

ans:2a+1

v:  ($5x^{2}$+2x+1)+($x^2$+x+3)

=($5x^{2}$+$x^2$)+(2x+x)+(1+3)

ans:$6x^2$+3x+4

vi:  ($5x^{2}$-x+3)+(-$2x^2$-2x-3)

ans:  $3x^2$-x

vii:  ($9m^2$+m+1)+(-$m^2$-2m-3)

ans:  $8m^2$-m-2

viii:  ($l^2$+2l+4)+(-$3l^2$-2l+4)

ans: -$2l^2$+8

sorry for no explanation from sixth quetion

hope this will help