Question

please help me it's very important​

Answer 1

Answer:

(i)

2a+b-c

a-b+c

- + -

a+0-2c

therefore, answer is a-2c

(ii)

x²-2xy+y²

x²+2xy+y²

- - -

0 -4xy+0

therefore, answer is -4xy

(iii)

x³-x²+x-3

0+x²-3x-3

- + +

x³-2x²+4x+0

therefore, answer is x³-2x²+4x

(iv)

5x²+3y²-2y

3x²- y²+0

- +

2x²+4y²-2y

therefore, answer is 2x²+4y²-2y

Answer 2

Step-by-step explanation:

1) a-b+c from 2a+b-c

2a+b-c -( a-b+c)

2a+b-c -a+b-c = a+2b-2c

2) x^2+2xy+y^2 from x^2-2xy+y^2

x^2-2xy+y^2-(x^2+2xy+y^2)

x^2-2xy+y^2-x^2-2xy-y^2

= -4xy

3) x^2-3x-3 from x-3-x^2+x^3

x-3-x^2+x^3-(x^2-3x-3)

x-3-x^2+x^3 -x^2+3x+3

= x^3+4x

4) 3x^2-y^2 from 5x^2-2y+3y^2

5x^2-2y+3y^2-(3x^2-y^2)

5x^2-2y+3y^2-3x^2+y^2

= -2x^2-4y^2+2y

=2x^2+4y^2-2y