Question

7a-2a+4b-2b =
5y²-5x-8y²+6x =
9x²+4x-3x²+3x =
x+7+x-10-1 =
x³-x²+7x²+10x³+4 =
2x³-7x²+4x-2+8-3x² =
4a²b-3b²-6b²-2a²b-1 =

Answer 1

a)

= 7a - 2a + 4b - 2b

= 5a + 2b
******************************
b)

= 5y² - 5x - 8y² + 6x
= 5y² - 8y² - 5x + 6x
= - 3y² + x

¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨
c)

= 9x² + 4x - 3x² + 3x

= 9x² - 3x² + 4x + 3x

= 6x² + 7x

**************************

d)

= x + 7 + x - 10 - 1

= x + 7 + x - 11

= x + x + 7 - 11

= 2x - 4

**********************************
e)

= x³ - x² + 7x² + 10x³ + 4

= x³ + 10x³ + 7x² - x² + 4

= 11x³ + 6x² + 4

*****************************
f)

= 2x³ - 7x² + 4x - 2 + 8 - 3x²

= 2x³ - 7x² - 3x² + 4x + 8 - 2

= 2x³ - 10x² + 4x + 6

**************************************
g)

= 4a²b - 3b² - 6b² - 2a²b - 1

= 4a²b - 9b² - 2a²b - 1

= 4a²b - 2a²b - 9b² - 1

= 2a²b - 9b² - 1

*********************************