fundamental concept
fundamental operation
ans for class 6
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Step-by-step explanation:
1. 2a²b³+8a²b²+5ab²-3ab²
= 2a²b³+8a²b²+ 2ab²
=2ab²(ab+4a+2)
2.Sum of x+y-2z and 2x-y+z
=x+y-2z+2x-y+z
= x+2x + y-y - 2z+z
= 3x+0-z
=3x-z
Now subtraction of x+y+z
=3x-z -( x+y+z)
=3x-z-x-y-z
=3x-x -y -z-z
=2x-y-2z
3.(2a+3b-4c)×(a-b-c)
=2a(a-b-c)+3b(a-b-c)-4c(a-b-c)
=2a²-2ab-2ac+3ab-3b²-3bc-4ac+4bc+4c²
=2a²-3b²+4c² -2ab+3ab-2ac-4ac-3bc+4bc
=2a²-3b²+4c²+ab-6ac+bc
4. x⁷-6y⁴
Degree of polynomial is 7
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