gcf(35x², 7xy², 21x²y²) = 7x
35x² = 5 times 7 times x²
7xy² = 7 times x times y²
21x²y² = 3 times 7 times x² times y²
hcf = 7 times x = 7x
(I've written the multiplication as times instead of using the × symbol to avoid confusion with the unknown x.)
The greatest common factor (GCF) is 7.
x
3x+21x+9x=33x. Break it apart. The factor of x is x and the factors of 33 are 3 and 11. Therefore, the factors of 3x+21x+9x are 3, 11, and x.
Make it equal zero by subtracting 21x from both sides. 20x2 - 21x - 5 factors to (4x - 5)(5x + 1)
3(7x-6)
3(7x + 11)
It is: 3x*(x+7)
(2x - 1)(x - 10)
(x - 8)(x - 13)
3x2-21x+36 =3(x2-7x+12) =3(x-4)(x-3)
(5x-6)(x-3)
7(3x plus or minus 5) depending on the missing sign.