Q82Multiple choice
Subtract :
- (i)5a2b2c 2 from – 7a2b2c 2
- (ii)6x2 – 4xy + 5y2 from 8y2 + 6xy – 3x2
- (iii)2ab2c 2 + 4a2b2c – 5a2bc2 from –10a2b2c + 4ab2c 2 + 2a2bc2
- (iv)3t 4 – 4t 3 + 2t 2 – 6t + 6 from – 4t 4 + 8t 3 – 4t 2 – 2t + 11 (v) 2ab + 5bc – 7ac from 5ab – 2bc – 2ac + 10abc (vi) 7p (3q + 7p) from 8p (2p – 7q) (vii) –3p2 + 3pq + 3px from 3p (– p – a – r)
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(i) 5a2b2c 2 from – 7a2b2c 2
(ii) 6x2 – 4xy + 5y2 from 8y2 + 6xy – 3x2
(iii) 2ab2c 2 + 4a2b2c – 5a2bc2 from –10a2b2c + 4ab2c 2 + 2a2bc2
(iv) 3t 4 – 4t 3 + 2t 2 – 6t + 6 from – 4t 4 + 8t 3 – 4t 2 – 2t + 11 (v) 2ab + 5bc – 7ac from 5ab – 2bc – 2ac + 10abc (vi) 7p (3q + 7p) from 8p (2p – 7q) (vii) –3p2 + 3pq + 3px from 3p (– p – a – r)