Algebraic Expressions and identities

The coefficient of  $x^2$   in 2- $x^2$  +2x is ______

• 1

• -1

• 2

• -2

Value of 5x-4 $x^2$ +7  at x=0 is _________

• 4

• 5

• 6

• 7

4 $x^2$  -9 $y^2$  is same as 

• (2x+3y)( 2x+3y)

• (2x+3y)( 2x-3y)

• (2x-3y)( 2x-3y)

• (2x+3y)( 3xy-2x)

The HCF of 8 $x^2y^2$  and 12 $x^2y$  is ____

• 4 x^2y

• 4x^2

• 8y

• 4xy

 Factors of  $x^2-\left(y+z\right)^2$   are

• (x-y-z)(x-y+z)

• (x-y-z)(x+y+z)

• (x+y-z)( (x-y-z)

• (x+y-z)( (x-y+z)