Question

plz factorise the above problems using identities......

Answer 1

(iii) t2-2t+1
=t2-t-t+1
= t(t-1) -1(t-1)
=(t-1) (t-1)
=t-1 =0
t=1,1

(iv) x2+3x+2
=x2+x+2x+2
=x(x+1) 2(x+1)
=(x+1) (x+2)
= x+1=0 x+2=0
=x=-1 x=-2