Difference of two squares
5 minutes - 5 questions !
Pick the correct answer for each question
Fully factorise 4c2 - 100
- Don't know
- 4( c + 5)( c - 5)
- ( 2c + 10)( 2c - 10)
- ( 4c - 10)( 4c + 10)
- ( 2c + 5)( 2c - 5)
Fully factorise 3b2 - 27
- Don't know
- 3( b + 3)( b - 3)
- 3( b + 9)( b - 9)
- 3(b2 - 9)
- ( 3b + 9)( b - 9)
Fully factorise 9a2 - q2
- Don't know
- ( 3a - q)( 3a + q)
- 3( a + q)( a - q)
- ( 9a - q)( 9a + q)
- ( 9a - q)( 9a + q)
Fully factorise a2 - 4q2r2
- Don't know
- (a + 2qr)(a - 2qr)
- (a + 4qr)(a - 4qr)
- 2(a + qr)(a - qr)
- (2a + 2qr)(2a - 2qr)
Fully factorise d4 - 81
- Don't know
- (d2 + 9)(d2 - 9)
- (d - 3)(d + 3)(d2 + 9)
- (d + 3)(d + 3)(d2 + 9)
- (d2 + 9)