1.

Factorise the following expressions (i) 7x − 42 (ii) 6p − 12q (iii) 7a2 + 14a (iv) −16z + 20z3 (v) 20l2m + 30 alm (vi) 5x2y − 15xy2 (vii) 10a2 − 15b2 + 20c2 (viii) −4a2 + 4ab − 4 ca (ix) x2yz + xy2z + xyz2 (x) ax2y + bxy2 + cxyz

Answer»

Factorise the following
expressions


(i) 7x
42


(ii) 6p
12q


(iii) 7a2
+ 14a


(iv) −16z
+ 20z3


(v) 20l2m
+ 30 alm


(vi) 5x2y
− 15xy2


(vii) 10a2
− 15b2 + 20c2


(viii) −4a2
+ 4ab − 4 ca


(ix) x2yz
+ xy2z + xyz2


(x) ax2y
+ bxy2 + cxyz



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