Q. 14.5( 23 Votes )

# Find the product:

Answer :

(i) By using the distributive law

= a(a + 5) +3((a+5)

= a^{2} +5a +3a +15

= a^{2} +8a +15

(ii) By using the distributive law

= 3t (3t + 4) + 1(3t + 4)

= 9t^{2} + 12t +3t + 4

= 9t^{2} + 15t +4

(iii) By using the distributive law

= a( a+2) –8(a+2)

= a^{2} + 2a – 8a – 16

= a^{2} – 6a –16

(iv) By using the distributive law

= a (a–2) – 6 ( a – 2)

= a^{2} –2a – 6a +12

= a^{2} – 8a +12

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