The GCF is 4y.
4y
The GCF is 6y
7x2 + 68xy - 20y2
20y2 - 11yz - 3z2 = 20y2 + 4yz - 15yz - 3z2 = 4y(5y + z) - 3z(5y + z) = (4y - 3z)(5y + z)
30y2
2(5x + 3y)(2x + 5y)
(4y - 1)(5y + 2)
This equation does not equal a number, but it can be factorised. x2-xy-20y2=(x-5y)(x+4y)
The GCF is 6.
The GCF is 9.
The GCF is 4.