Factorise $10x+50$10x+50.
Factorise $7v-v^2$7v−v2.
Factorise $z^2+4z^4$z2+4z4.
Factorise the following expression by taking out the common factor:
$5\left(a+b\right)+v\left(a+b\right)$5(a+b)+v(a+b)
uses algebraic and graphical techniques to solve, and where appropriate, compare alternative solutions to problems