7x-4020+3x= 7x+-4020+3x= 7x+3x+-4020= 10x+-4020= 10x-4020
-3x + 10x - 5 + 26 = 7x + 21
if its x(squared) its 7x(cubed) if its 2xX its 14x(squared)
7(3y-2)-(-4y+9)
10x + 5 = 5(2x + 1)
8y-7x
20x3 - 70x2 + 60x = 10x(2x2 - 7x + 6) = 10x(2x - 3)(x - 2).
7x + 8
7x + 8 = 10x - 2 ∴ 3x = 10 ∴ x = 10/3
No
25x method 8x4=32-7x=25x?
7x2 -4x -5x2 +2x = 2x2 -2x
x2 + 7x - 56 cannot be factorised.
(7x + 8)(7x - 9)
(x2 + 7x - 18) = (x + 9)(x - 2)
7x+6 = -3x-24 7x+3x = -24-6 10x = -30 x = -3
49x2 - 84x + 36 = (7x - 6)(7x - 6) or (7x - 6)2