simplify by combining like terms
Answers
Answer:
by adding same terms
b. 10m+2n-9m+8n+14-6m
Step-by-step explanation:
=(10m-9m-6m)+(2n+8n)+14
=-5m+10n+10 Ans
Answer:
b)10m+2n-9m+8n+14-6m
=10m-9m-6m+2n+8n+14
=(-5m)+10n+14
=5m-10n-14
c)a-(a-b)-b-(b-a)
=a-a+b-b-b+a
=a-a+a+b-b-b
=a-b
d)(2x²-y²-4xy)+(x²+5y²-9xy)
=2x²-y²-4xy+x²+5y²-9xy
=2x²+x²-y²+5y²-4xy-9xy
=3x²+4y²-13xy
e)m-(m+n)-n+(m-n)+6n
=m-m-n-n+m-n+6n
=m-m+m-n-n-n+6n
=m+3n
f)z²+2z³-6z+15-4z²+2z-9
=2z³+z²-4z²-6z+2z+15-9
=2z³-3z²-4z+6
g)a+b-(2a+3b+ab)+6ab+(a-4b-2ab)
=a+b-2a-3b-ab+6ab+a-4b-2ab
=a-2a+a+b-3b-4b-ab+6ab-2ab
=(-6b)+3ab
=6b-3ab
=2b-ab
h)6x²+9y²+2xy-4x²-7y²+8xy
=6x²-4x²+9y²-7y²+2xy+8xy
=2x²+2y²+10xy
=x²+y²+5xy
i)6mn-2m²+4n²-2mn+4m²+2n²+21
=4m²-2m²+4n²+2n²+6mn-2mn+21
=2m²+6n²+4mn+21
j)(2m²+m-4)-(m²-4m+9)
=2m²+m-4-m²+4m-9
=2m²-m²+m+4m-4-9
=m²+5m-13
k)(y²+5y-8)-(2y-6y²+4)
=y²+5y-8-2y+6y²-4
=y²+6y²+5y-2y-8-4
=7y²+3y-12
l)2x²y-3x²+yx²-y²+2x²-6y²+4xy²-2y²
=2x²y-3x²+x²y-y²+2x²-6y²+4xy²-2y²
=2x²-3x²-y²-6y²-2y²+2x²y+x²y+4xy²
=(-2x²)-9y²+3x²y+4xy²
=2x²+9y²-3x²y-4xy²