Factoriser :
D = ( 7x - 1 ) ( 2x + 1 ) + ( 2x + 1 ) ( 3x - 4 )
E = ( 3p - 4 ) ( p + 1 ) - ( 9p + 6 )
F = 2 (5s + 2) + (5s + 2 )²
G = ( 7r - 2)² - (2r + 3)²
H = 81 - ( 7 k + 2)²
D = ( 7x - 1 ) ( 2x + 1 ) + ( 2x + 1 ) ( 3x - 4 )
E = ( 3p - 4 ) ( p + 1 ) - ( 9p + 6 )
F = 2 (5s + 2) + (5s + 2 )²
G = ( 7r - 2)² - (2r + 3)²
H = 81 - ( 7 k + 2)²
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Verified answer
BonsoirD = ( 7x - 1 ) ( 2x + 1 ) + ( 2x + 1 ) ( 3x - 4 )
(2x+1)(7x-1 +3x-4)
(2x+1)(10x -5)
E = ( 3p - 4 ) ( p + 1 ) - ( 9p + 6 )
p((3 -4)(1 - 9 +6)
p( -1)(-2)
F = 2 (5s + 2) + (5s + 2 )²
(5s+2) (2 +5s+2)
(5s+2)(5s+4)
G = ( 7r - 2)² - (2r + 3)²
(7r -2 +2r +3)(7r -2 -2r -3)
(9r +1)(5r -5)
H = 81 - ( 7 k + 2)²
(9 - 7k -2)(9 +7k+2)
(-7k +7)( 7k +11)