21 = 3 x 7 and 7 - 3 = 4 so: (x + 7)(x - 3)
16x2 - 56x + 49 = (4x - 7)2
x2 - 4x - 21 = (x-7)(x+3)
4x + 20
4x+13 = 21 4x = 21-13 4x = 8 x = 2
This would simplify as 4x-5
16x2 - 56x + 49 = (4x - 7)2
x2 - 4x - 21 = (x-7)(x+3)
(4x-8)(2x+2)
4x + 20
minus 1
x - 2
The factorisation is as follows: 4x² + 12x + 9 = (2x + 3)2.
(-4x + 3)(x - 2)Apex :)!!
4x+13 = 21 4x = 21-13 4x = 8 x = 2
This would simplify as 4x-5
-3x=-21+4x-3x-4x=-21+4x-4x-7x=-217x=217x/7=21/7x=3
x2 + 4x - 32 = (x + 8)*(x - 4)