(I) x2+2x-3=(x-3)(x+1) (II) x2-4x-5=(x-5)(x+1) (iii) x2+3x-10=(x+5)(x-2) (iv) 2x2+7x+6=(2x-3)(x-2)

(i)x²+2x-3=(x-3)(x+1)
=x²+x-3x-3
=x²-2x+3
prnytaan slah
(ii) x²-4x-5=(x-5)(x+1)
=x²+1x-5x-5
=x²-4x-5
prnytaan bnr
(iii) x²+3x-10=(x+5)(x-2)
=x²-2x+5x-10
=x²+3x-10
prnytaan bnr
(iv) 2x²+7x+6=(2x-3)(x-2)
=2x²-4x-3x+6
=2x²-7x+6
prnytaan slh