Evaluate the following-1 3pq3 - 4qr2 -2a3b - 3ab2c

(1) 3pq3× 4qr nbsp;=3× p × q × q× q × 4 × q × r =3 × 4 × p × q × q × q × q × r =12 × p × q^4 × r =12 pq^4r (2) nbsp; –2a3b × 3ab2c nbsp; nbsp;= –2 ...

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Standard VIII

Mathematics

Finding Square of a Number Using Identity

Evaluate the ...

Question

Evaluate the following:
(1) 3p $q^{3} \times$ 4qr
(2) -2 $a^{3} b \times 3 a b^{2} c$

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Solution

(1)
3pq³× 4qr
$= 3 \times p \times q \times q \times q \times 4 \times q \times r = 3 \times 4 \times p \times q \times q \times q \times q \times r = 12 \times p \times q^{4} \times r = 12 p q^{4} r$
(2) –2a³b × 3ab²c
= –2 × 3× a³× a × b × b² × c
= $- 6 \times a^{4} \times b^{3} \times c$
= $- 6 a^{4} b^{3} c$

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Evaluate the following: (1) 3pq3× 4qr (2) -2a3b×3ab2c

(1) 3pq3× 4qr =3×p×q×q×q×4×q×r=3×4×p×q×q×q×q×r=12×p×q4×r=12pq4r (2) –2a3b × 3ab2c = –2 × 3× a3× a × b × b2 × c = −6×a4×b3×c = −6a4b3c

Evaluate the following:
(1) 3p $q^{3} \times$ 4qr
(2) -2 $a^{3} b \times 3 a b^{2} c$