Q83Multiple choice
Multiply the following:
- (i)– 7pq2r 3, – 13p3q2r
- (ii)3x 2y2z2, 17xyz
- (iii)15xy2, 17yz2
- (iv)–5a2bc, 11ab, 13abc2 (v) –3x2y, (5y – xy) (vi) abc, (bc + ca) (vii) 7pqr, (p – q + r) (viii) x2y2z2, (xy – yz + zx) (ix) (p + 6), (q – 7) (x) 6mn, 0mn (xi) a, a5, a6 (xii) –7st, –1, – 13st2 (xiii) b 3, 3b2, 7ab5 100 3 (xiv) – rs; r 3s 2 9 4 (xv) (a2 – b2), (a2 + b2) (xvi) (ab + c), (ab + c) (xvii) (pq – 2r), (pq – 2r) 3 4 2 3 (xviii) x – y , x + y 4 3 3 2 3 2 2 2 (xix) p + q , (2p2 –3q2) 2 3 (xx) (x2 – 5x + 6), (2x + 7) (xxi) (3x2 + 4x – 8), (2x2 – 4x + 3) (xxii) (2x – 2y – 3), (x + y + 5)
Show answer
(i) – 7pq2r 3, – 13p3q2r
(ii) 3x 2y2z2, 17xyz
(iii) 15xy2, 17yz2
(iv) –5a2bc, 11ab, 13abc2 (v) –3x2y, (5y – xy) (vi) abc, (bc + ca) (vii) 7pqr, (p – q + r) (viii) x2y2z2, (xy – yz + zx) (ix) (p + 6), (q – 7) (x) 6mn, 0mn (xi) a, a5, a6 (xii) –7st, –1, – 13st2 (xiii) b 3, 3b2, 7ab5 100 3 (xiv) – rs; r 3s 2 9 4 (xv) (a2 – b2), (a2 + b2) (xvi) (ab + c), (ab + c) (xvii) (pq – 2r), (pq – 2r) 3 4 2 3 (xviii) x – y , x + y 4 3 3 2 3 2 2 2 (xix) p + q , (2p2 –3q2) 2 3 (xx) (x2 – 5x + 6), (2x + 7) (xxi) (3x2 + 4x – 8), (2x2 – 4x + 3) (xxii) (2x – 2y – 3), (x + y + 5)