5 = 1 x 5, 21 = 3 x 7
3 x 5 = 15, 1 x 7 = 7, 15 - 7 = 8 so:
(5x + 7)(x - 3)
It is: 2a(2b+c)
(2a - 5b)(5a - b)
a(5+b)
The GCF is 4.
The GCF is 6
If that's +8y2, the answer is (x - 4y)(x - 2y)
you can factorise 5x2-24x-12 if you use the quadratic formula: This goes to (24(+/-)sqrt(816))/(10) =5.257 or -0.4566 (4s.f.)
If it does not have a common factor, you cannot factorise it!
2a(2b-c) :P
2a(2b) Would Give You The Answer 4ab. 2x2 = 4 And a x b = ab.
4ab - 6ab = ab(4 - 6). ab(4 - 6) = 2ab(2-3)
(-a-7b+5)4ab
5a³ - 4ab + 2a³ = (5+2)a³ - 4ab = 7a³ - 4ab.
ab-2ac+b^2-2bc
4a2 + 4ab - y2 + b2 You cannot simplify this expression because it does not contain like terms, but you can factor it such as: 4a2 + 4ab - y2 + b2 = (4a2 + 4ab + b2) - y2 = (2a + b)2 - y2 = [(2a + b) - y][(2a + b) + y]
(a + 2b)(a + 2b)
(a + 6)(a + 4)
(a + b)(b - 2c)
(a + b)(b - 2c)
X=5