Fill in the boxes to complete the equality:
$11u-19u^2=u\left(\editable{}-\editable{}\right)$11u−19u2=u(−)
Factorise the following expression by taking out the highest common factor:
$42x-x^2$42x−x2
Factorise the following expression by taking out the highest common factor:
$4pqr-9pst$4pqr−9pst
Factorise the following expression:
$2yz-16xy+16xy^2z$2yz−16xy+16xy2z