Question

Factorise: (i) q2–10q+21 (ii) 4yz(z2+6z–16)÷2y(z+8)

Answer 1

i) q^2-10q+21

= q^2-7q-3q+21

= q(q-7) - 3(q-7)

= (q-3)(q-7)

next one i will do in paper and send. Please mark me as brainlist