Q24.Expand (a) (4a-b+2c)2 (b) (3a -5b-c) 2 (c) (-x+2y-3z) 2
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a)(4a-b+2c)2= 4a×2 -b×2+2c×2
=8a-2b+4c
b) (3a-5b-c)2= 3a×2 -5b×2 -c×2
= 6a -10b -2c
c) (-x +2y -3z)2= -x×2 + 2y ×2 -3z ×2
= -2x +4y-6z
=8a-2b+4c
b) (3a-5b-c)2= 3a×2 -5b×2 -c×2
= 6a -10b -2c
c) (-x +2y -3z)2= -x×2 + 2y ×2 -3z ×2
= -2x +4y-6z
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