The Total solution for NCERT class 6-12
Carry out themultiplication of the expressions in each of the following pairs:(i) 4p, q + r(ii) ab, a – b(iii) a + b, 7a2b2(iv) a2 – 9, 4a(v) pq + qr + rp, 0
(i) 4p × (q + r) = (4p × q) + (4p × r) = 4pq + 4pr(ii) ab, a – b = ab × (a – b) = (ab × a) – (ab × b) = a2b – ab2(iii) (a + b) × 7a2b2 =(a × 7a2b2) + (b× 7a2b2) = 7a3b2 +7a2b3(iv) (a2 –9) × 4a = (a2 ×4a) – (9 × 4a) = 4a3 –36a(v) (pq + qr + rp) × 0 = 0[∵ Anynumber multiplied by 0 is = 0]