Question

Expand using appropriate identities.
(i) (3p+2q)^2
(ii) (105)^2
(iv) (98)^2
(v) (y - 5)(y + 5)
(vii) (2m + n)(2m + p)
(viii) 203 x197
(iii) (2x - 5d)^2
(vi) (3x)^2 - 5^2
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Answer 1

Step-by-step explanation:

(3p+2q)^2

by (a+b)^2=a^2+b^2 + 2ab

9p^2+4q^2 + 12pq

Answer 2

10000+1000+25

Step-by-step explanation:

(105)^2=(100+5)^2

(a+b)^2=a^2+2ab+b^2

(100+5)^2=100^2+2(100)(5)+5^2

=10000+1000+25

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